Lois Frankel, Florida
Tulsi Gabbard, Hawaii
Joaquin Castro, Texas
10:59 a.m. ET -- Heritage Action for America, a conservative political advocacy group, announces it also opposes military action in Syria.
"Heritage Action is opposed to punitive missile strikes on the Syrian regime," Dan Holler, the group's communications director, said in a statement. "Yesterday's hearing made it clear there is not a vital U.S. interest at stake. Further, there is not a clear, achievable, realistic purpose to the use of force being contemplated by the Obama administration and officials offered little evidence such action would prevent further abuses."
10:58 a.m. ET -- The Progressive Change Campaign Committee announces it's sending a memo to members of Congress, including those whom the PCCC campaigned for, saying the progressive base overwhelmingly opposes military strikes Syria. According to a survey of its members, 73% of progressive respondents were not in favor of the president's proposal for punitive action, while 18% supported the president's decision.
"You now face a decision that involves life and death. This decision also involves billions of dollars. And it will send a signal to your constituents and the world about our nation's morals and our ability to make strategic, goal-oriented decisions. This historic moment must transcend political party," Adam Green and Stephanie Taylor, the group's co-founders, say in the memo. "Your progressive base stands firmly against military action in Syria."
10:30 a.m. ET - Two new polls on Tuesday indicated that more people oppose rather than favor U.S. military strikes against Syria.
Both surveys were conducted before and after President Obama's Saturday announcement that he would seek Congressional approval.
According to the survey from ABC News/Washington Post, 36% of Americans support military strikes, while 59% oppose. Support for strikes increases to 46% if other countries, such as Great Britain and France, participated.
Separately, a Pew Research Center poll shows that 29% Americans oppose military action, while 48% are against launching strikes.
9:30 a.m. ET -- The Senate Armed Services Committee gets classified briefing on the situation in Syria from Hagel and Dempsey.
9:09 a.m. ET - During a press conference in Sweden, President Obama says he didn't "set a red line--the world set a red line" on chemical weapons being used in Syria.
Flashback: Last August the president stated: "We have been very clear to the Assad regime, but also to other players on the ground, that a red line for us is that we start to see a whole bunch of chemical weapons moving around or being utilized and that would change my calculus, and my equation."
8 a.m. ET -- On Wednesday, the Senate Foreign Relations Committee takes up a revised bill authorizing a military strike - one that sets a 60-day deadline for use of force in Syria, with an option for an additional 30 days. More lawmakers may come on board with such a stipulation.