Sen. Rand Paul (R-Ky.) criticized Secretary of State Hillary Clinton Wednesday during the Senate Foreign Relations Committee hearing over the terrorist attack in Benghazi, Libya, that killed Ambassador Chris Stevens and three other Americans.

"I'm glad that you're accepting responsibility," said Paul. "I think ultimately with your leaving that you accept the culpability for the worst tragedy since 9/11. And I really mean that."

"Had I been president and found you did not read the cables from Benghazi and from Ambassador Stevens, I would have relieved you of your post. I think it's inexcusable," he said, referencing Clinton's comments that she had not read all of the documentation surrounding the attack.

"I think we can understand you're not reading every cable," Paul said. He added that he didn't suspect Clinton of "bad motives" but said that it was a "failure of leadership."

Clinton responded, "I am the Secretary of State. And the [Accountability Review Board] made very clear that the level of responsibility for the failures that they outlined was set at the Assistant Secretary level and below."

Sen. Chris Murphy (D-Conn.) rebuked Paul in the next exchange. "If some people on this committee want to call this tragedy the worst since 9/11, it misunderstands the nature of 4000 plus Americans lost in the War in Iraq under false pretenses."

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    John Kerry leaves a Senate Foreign Relations Committee markup on Jan. 29, 2013 after a vote was held on his confirmation as Secretary of State. (SAUL LOEB/AFP/Getty Images)

  • Hillary Clinton (2009-13)

    U.S. Secretary of State Hillary Clinton speaks at a press conference on November 14, 2012. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Condoleezza Rice (2005-09)

    Secretary of State Condoleezza Rice talks about the State Department's 2007 Country Reports on Human Rights Practices during a March 11, 2008 briefing in Washington. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Colin Powell (2001-05)

    U.S. Secretary of State Colin Powell speaks on June 22, 2004, about a corrected version of an inaccurate terrorism report issued by the government. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Madeleine Albright (1997-2001)

    U.S. Secretary of State Madeleine Albright delivers a Russia policy briefing on September 16, 1999 in Washington. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Warren Christopher (1993-97)

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  • Lawrence Eagleburger (1992-93)

    Then-acting Secretary of State Lawrence Eagleburger listens to a reporter's question during a Nov. 18, 1992 news conference at the State Department. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • James Baker (1989-92)

    James Baker III waves to his associates at the US State Department on August 13, 1992. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • George P. Shultz (1982-89)

    U.S. Secretary of State George Shultz listens to a question during his first day of testimony before Iran-Contra investigators on July 23, 1987 in Washington. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Alexander Haig (1981-82)

    Alexander Haig, Secretary of State-designate, a Reagan nominee on Monday, Dec. 23, 1980 in Washington for the announcement of selections. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Edmund Muskie (1980-81)

    (Pictured left) Freed hostage Richard Queen, right, greets well wishers at the State Department on Monday, July 21, 1980 in Washington. At left is Secretary of State Edmund Muskie. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Cyrus Vance (1977-80)

    Cyrus Vance, U.S. Secretary of State, pictured in 1979. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Henry Kissinger (1973-77)

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  • William P. Rogers (1969-73)

    Israeli Defense Minister Moshe Dayan, left, and Secretary of State William P. Rogers begin talks at the Department of State on Feb. 7, 1972 in Washington. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Dean Rusk (1961-69)

    Secretary of State Dean Rusk is shown during a news conference in Washington, D.C., on March 1, 1962. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Christian Herter (1959-61)

    President Dwight Eisenhower, left, says goodbye to Secretary of State Christian Herter in Gettsburg, Pennsylvania, on May 2, 1959 as Herter is about to board a helicopter on the President's farm to return to Washington. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • John Foster Dulles (1953-59)

    U.S. Secretary of State John Foster Dulles (left) gets together with South Korean President Syngman Rhee in Seoul on August 4, 1953. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Dean Acheson (1949-53)

    U.S. Secretary of State Dean Acheson speaks from the State Department on Nov. 29, 1950 in Washington. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • George C. Marshall (1947-49)

    Gen. George C. Marshall poses in his Red Cross office on Sept. 13, 1950 in Washington. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • James F. Byrnes (1945-47)

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  • Edward Reilly Stettinius (1944-45)

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  • Cordell Hull (1933-44)

    U.S. President Franklin Roosevelt is greeted by Secretary of State Cordell Hull on Sept. 15, 1938 in Washington. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Henry Lewis Stimson (1929-33)

    Henry Lewis Stimson, American Secretary of State for War shown around July 1931. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Frank B. Kellogg (1925-29)

    Former United States Secretary of State Frank B. Kellogg on Aug. 17, 1936 at Waterloo Station in London. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)

  • Charles Evans Hughes (1921-25)

    (Center) Former Secretary of State and Chief justice Charles Evans Hughes, pictured on on March 27, 1931. (Source: <a href="http://www.state.gov/secretary/former/">U.S. Department Of State</a>)