WASHINGTON -- Sen. Chuck Schumer is giving his backing to President Barack Obama's choice to be defense secretary, former Sen. Chuck Hagel -- a nominee who raised red flags with strong supporters of Israel such as the New York Democrat.

"When Senator Hagel’s name first surfaced as a potential nominee for Secretary of Defense, I had genuine concerns over certain aspects of his record on Israel and Iran," Schumer said in a statement Tuesday, a day after meeting with Hagel for an hour and a half at the White House in a private session to hash out Schumer's concerns.

"Senator Hagel could not have been more forthcoming and sincere," Schumer said.

"On Iran, Senator Hagel rejected a strategy of containment and expressed the need to keep all options on the table in confronting that country," Schumer said, referring to comments that Hagel's opponents pointed to as evidence he could be soft on Israel's arch enemy. "But he didn’t stop there. In our conversation, Senator Hagel made a crystal-clear promise that he would do 'whatever it takes' to stop Tehran from obtaining nuclear weapons, including the use of military force. He said his 'top priority' as Secretary of Defense would be the planning of military contingencies related to Iran."

Schumer said that Hagel, a Nebraska Republican, also reassured him on other past statements that have generated controversy, including ones about Hezbollah and Hamas.

"On Hezbollah, Senator Hagel stressed that—notwithstanding any letters he refused to sign in the past—he has always considered the group to be a terrorist organization," Schumer said. "On Hamas, I asked Senator Hagel about a letter he signed in March 2009 urging President Obama to open direct talks with that group’s leaders. In response, Senator Hagel assured me that he today believes there should be no negotiations with Hamas, Hezbollah or any other terrorist group until they renounce violence and recognize Israel’s right to exist."

Hagel had also taken heat for describing American supporters of Israel as the "Jewish lobby."

"Senator Hagel understands the sensitivity around such a loaded term and regrets saying it," Schumer said.

On top of concerns about Israel and Iran, other opponents had been worried about Hagel's stances on women and gays in the military. Schumer professed himself satisfied there, as well.

"He said he is committed to implementing the Shaheen amendment to improve the reproductive health of military women. He also supports the full repeal of Don’t Ask, Don’t Tell," Schumer said.

After speaking with Hagel -- a rare case of a member not on the Armed Services Committee meeting a nominee for defense secretary -- Schumer met with Obama. Schumer told Hagel of his support Tuesday morning, an aide said.

Read Schumer's full statement:

When Senator Hagel’s name first surfaced as a potential nominee for Secretary of Defense, I had genuine concerns over certain aspects of his record on Israel and Iran. Once the President made his choice, however, I agreed to keep these reservations private until I had the opportunity to discuss them fully with Senator Hagel in person.

In a meeting Monday, Senator Hagel spent approximately 90 minutes addressing my concerns one by one. It was a very constructive session. Senator Hagel could not have been more forthcoming and sincere.

Based on several key assurances provided by Senator Hagel, I am currently prepared to vote for his confirmation. I encourage my Senate colleagues who have shared my previous concerns to also support him.

In our meeting Monday, Senator Hagel clarified a number of his past statements and positions and elaborated on several others.

On Iran, Senator Hagel rejected a strategy of containment and expressed the need to keep all options on the table in confronting that country. But he didn’t stop there. In our conversation, Senator Hagel made a crystal-clear promise that he would do “whatever it takes” to stop Tehran from obtaining nuclear weapons, including the use of military force. He said his “top priority” as Secretary of Defense would be the planning of military contingencies related to Iran. He added that he has already received a briefing from the Pentagon on this topic.

In terms of sanctions, past statements by Senator Hagel sowed concerns that he considered unilateral sanctions against Iran to be ineffective. In our meeting, however, Senator Hagel clarified that he “completely” supports President Obama’s current sanctions against Iran. He added that further unilateral sanctions against Iran could be effective and necessary.

On Hezbollah, Senator Hagel stressed that—notwithstanding any letters he refused to sign in the past—he has always considered the group to be a terrorist organization.

On Hamas, I asked Senator Hagel about a letter he signed in March 2009 urging President Obama to open direct talks with that group’s leaders. In response, Senator Hagel assured me that he today believes there should be no negotiations with Hamas, Hezbollah or any other terrorist group until they renounce violence and recognize Israel’s right to exist.

Senator Hagel volunteered that he has always supported Israel’s right to retaliate militarily in the face of terrorist attacks by Hezbollah or Hamas. He understood the predicament Israel is in when terrorist groups hide rocket launchers among civilian populations and stage attacks from there. He supported Israel’s right to defend herself even in those difficult circumstances.

In keeping with our promises to help equip Israel, Senator Hagel pledged to work towards the on-time delivery of the F-35 joint strike fighters to Israel, continue the cooperation between Israel and the U.S. on Iron Dome, and recommend to the President that we refuse to join in any NATO exercises if Turkey should continue to insist on excluding Israel from them. Senator Hagel believes Israel must maintain its Qualitative Military Edge.

Regarding his unfortunate use of the term “Jewish lobby” to refer to certain pro-Israel groups, Senator Hagel understands the sensitivity around such a loaded term and regrets saying it.

I know some will question whether Senator Hagel’s assurances are merely attempts to quiet critics as he seeks confirmation to this critical post. But I don’t think so. Senator Hagel realizes the situation in the Middle East has changed, with Israel in a dramatically more endangered position than it was even five years ago. His views are genuine, and reflect this new reality.

On issues related to female and LGBT service members, Senator Hagel provided key assurances as well. He said he is committed to implementing the Shaheen amendment to improve the reproductive health of military women. He also supports the full repeal of Don’t Ask, Don’t Tell.

In general, I believe any President deserves latitude in selecting his own advisors. While the Senate confirmation process must be allowed to run its course, it is my hope that Senator Hagel’s thorough explanations will remove any lingering controversy regarding his nomination.

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    New Secretary of Defense Chuck Hagel is greeted as he arrives for his first day at the Department of Defense, on February 27, 2013 in Arlington, Va. (Photo by Drew Angerer/Getty Images)

  • Leon Panetta (July 2011 - February 2013)

    Secretary of Defense Leon E. Panetta pauses while speaking during a ceremonial swearing-in at the Department of Defense July 22, 2011 in Washington. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Robert Gates (Dec. 2006 - July 2011)

    Robert Gates speaks during his ceremonial swearing in as the 22nd defense secretary on Dec. 18, 2006 at the Pentagon. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Donald Rumsfeld (Jan. 2001 - Dec. 2006)

    U.S. Secretary of Defense Donald Rumsfeld holds his press conference at the Pentagon briefing room on Jan. 26, 2001 in Arlington, Va. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • William Cohen (Jan. 1997 - Jan. 2001)

    Secretary of Defense designate William Cohen testifies during confirmation hearings before the Senate Armed Services Committee on Jan. 22, 1997 in Washington. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • William Perry (Feb. 1994 - Jan. 1997)

    U.S. Defense Secretary William Perry points to a reporter during a press conference on April 21, 1994 in Seoul, Korea. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Les Aspin (Jan. 1993 - Feb. 1994)

    U.S. Secretary of Defense Les Aspin released new regulations governing gays in the military during a press on Dec. 22, 1993 at the Pentagon. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Dick Cheney (March 1989 - Jan. 1993)

    U.S. Defense Secretary Dick Cheney (L) meets Egypt's President Hosni Mubarak, on April 3, 1989, at Washington. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Frank Carlucci (Nov. 1987 - Jan. 1989)

    U.S. Defense Secretary Frank Carlucci testifies before the Senate Armed Services Committee on July 13, 1988 in Washington. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Caspar Weinberger (Jan. 1981 - Nov. 1987)

    Caspar Weinberger, Secretary of Defense on Feb. 9, 1981. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Harold Brown (Jan. 1977 - Jan. 1981)

    General Alexander M. Haig, right, retired as NATO commander, walks with Defense Secretary Harold Brown during an awards ceremony on July 3, 1979 at Fort Myer, Va. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Donald Rumsfeld (Nov. 1975 - Jan. 1977)

    A 1976 photo of Secretary of Defense Donald Rumsfeld. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • James Schlesinger (July 1973 - Nov. 1975)

    Israeli Defense Minister Moshe Dayan, left, with Secretary of Defense James R. Schlesinger, chats on Friday, Jan. 5, 1974 at the Pentagon. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Elliot Richardson (Jan. 1973 - May 1973)

    Elliot L. Richardson speaks to newsmen Oct. 23, 1973 at a press conference held at the Department of Justice. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Melvin Laird (Jan. 1969 - Jan. 1973)

    Secretary of Defense Melvin R. Laird as he departed from Andrews Air Force Base Md., for Paris on Jan. 5, 1971 in Washington. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Clark Clifford (March 1968 - Jan. 1969)

    This is an Oct. 1968 photo of Secretary of Defense Clark Clifford as he announces his support for President Johnson's decision to halt the bombing of North Vietnam. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Robert McNamara (Jan. 1961 - Feb. 1968)

    PARIS, FRANCE: US Secretary of Defense Robert McNamara smiles as he arrives 27 November 1965 at Paris' NATO headquarters. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Thomas Gates (Dec. 1959 - Jan. 1961)

    Secretary of Defense Thomas S. Gates Jr., center, poses with Benjamin M. McKelway, left, editor of the Washington Evening Star and President of the AP, and AP General Manager Frank J. Starzel at the April 25, 1960 meeting of the Associated Press in New York. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Neil McElroy (Oct. 1957 - Dec. 1959)

    Defense Secretary Neil McElroy said he has "fullest confidence that the United States is ahead of the Soviets..." prior to the announcement of the Soviet's achievement in launching the first earth satellite, Oct. 4, 1958. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Charles Wilson (Jan. 1953 - Oct. 1957)

    Charles E. Wilson, left, takes the oath of office from Chief Justice Fred Vinson at the White House in Washington on Dec. 21, 1950 as head of the office of Defense Mobilization. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Robert Lovett (Sept. 1951 - Jan. 1953)

    Gen. Dwight D. Eisenhower (right) watches President Harry S. Truman and Gen. Omar Bradley help Defense Secretary Robert Lovett (left) get in place as the men posed on the south lawn of the White House on June 1, 1952 in Washington. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • George Marshall (Sept. 1950 - Sept. 1951)

    Anna M. Rosenberg, New York Labor and Public Relations consultant, who is named assistant secretary of defense, chats with Secretary of Defense George Marshall in a conference at the Pentagon on Nov. 9, 1950 in Arlington, Va. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • Louis Johnson (March 1949 - Sept. 1950)

    Defense Secretary Louis Johnson (right) gives new identification card to President Harry Truman at the White House on Nov. 9, 1949 in Washington, listing him as commander in chief for an "indefinite" term. (Source: <a href="http://www.defense.gov/specials/secdef_histories/">Department of Defense</a>)

  • James Forrestal (Sept. 1947 - March 1949)

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