President Barack Obama and his administration will spend much of Tuesday trying to get lawmakers on Capitol Hill to support U.S. military action against the Syrian regime, in response to what the administration says was a chemical attack on Syrian civilians carried out by the regime.

President Barack Obama (2R) meets with Senators John McCain and Lindsey Graham (R), and National Security Advisor Susan E. Rice (L) to discuss Syria in the Oval Office of the White House (Pete Souza/White House via Getty Images)

Obama meets Tuesday with leaders of the House and Senate armed services committees, foreign relations committees and intelligence committees.

And in the afternoon, Obama's secretary of State, Defense secretary and chairman of the Joint Chiefs of Staff will testify publicly before the Senate Foreign Relations Committee.

Obama seeks support for Syria strike at G20

WASHINGTON (AP) — President Barack Obama will urge leaders attending a global summit in Russia this week to back an American-led strike against Syria.

Hanging over Obama's three-day overseas trip will also be his tense relationship with Russian President Vladimir Putin the world leader who has perhaps done the most to stymie international efforts to oust Syria's Bashar Assad.

The timing of the international meetings pulls Obama away from Washington just as he's seeking to rally lawmakers to back military action against Syria in retaliation for what the Obama administration says was a chemical weapons attack.

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