WASHINGTON -- President Barack Obama will meet with Senate Democrats Tuesday to seek support for U.S. military action against the government of Syria, a Senate Democratic aide said Sunday.

The meeting at the Capitol would come just hours before Obama addresses the nation in a prime-time speech on Syria from the White House.

The Senate aide spoke on condition of anonymity because he was not authorized to publically discuss the meeting before its official announcement.

Obama faces difficult odds to win congressional authorization for any use of force against the regime of Syrian President Bashar Assad. Obama blames Assad's military for a chemical weapons attack against civilians last month outside Damascus.

The president is making a determined last-ditch effort for authorization, granting a series of network interviews Monday to make his case. Sunday night, he dropped in on a dinner held by Vice President Joe Biden for Republican senators.

Amid skepticism from both parties, the Senate is expected to hold its first showdown vote on a use-of-force resolution Wednesday.

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  • Susan Rice

    "All of this is horrific. All of us as human beings feel terrible when we see the extraordinary loss of life that [has] occurred in Syria," Rice said. "With chemical weapons, they can kill with indiscriminate abandon. People who are innocent are employed in conflict. It is of a greater magnitude because if terrorists get ahold of those weapons, if other dictators get ahold of those weapons, they can be used on a massive scale."

  • John Boehner

    "We have enemies around the world that need to understand that we're not going to tolerate this type of behavior."

  • John McCain

    "I am against delaying reaction to what is a massacre of a thousand people," McCain said. "You saw these pictures of these dead children. Come on. This is horrific. We can't stand by and watch this happen."

  • John Kerry

    "This is what Assad did to his own people," Kerry said. If the U.S. allowed "a thug and a murderer like Bashar al-Assad" to get away with gassing his own people, he added, "there will be no end to the test of our resolve and the dangers that will flow from those others who believe that they can do as they will."

  • Rand Paul

    "I think the Islamic rebels winning is a bad idea for the Christians, and all of a sudden we'll have another Islamic state where Christians are persecuted," Paul said.

  • Sarah Palin

    "As I said before, if we are dangerously uncertain of the outcome and are led into war by a Commander-in-chief who can’t recognize that this conflict is pitting Islamic extremists against an authoritarian regime with both sides shouting 'Allah Akbar' at each other, then let Allah sort it out," Palin continued.

  • Ted Cruz

    “We should be focused on defending the United States of America. That’s why young men and women sign up to join the military, not to, as you know, serve as Al Qaeda’s air force.”

  • Barack Obama

    "This attack is an assault on human dignity. It also presents a serious danger to our national security. It risks making a mockery of the global prohibition on the use of chemical weapons. It endangers our friends and our partners along Syria’s borders, including Israel, Jordan, Turkey, Lebanon and Iraq. It could lead to escalating use of chemical weapons, or their proliferation to terrorist groups who would do our people harm. "In a world with many dangers, this menace must be confronted."

  • Bob Menendez

    "Assad has made a calculation now ... that he can use chemical weapons, or he believes he can use chemical weapons without consequence," Menendez said. "And in doing so there is a global message that in fact other state actors and other non-state actors may believe they can do so as well."