U.S. President Barack Obama is continuing his push for congressional support of U.S. military action in Syria.
Obama is hosting a meeting Monday at the White House with prominent Senator John McCain, who has long been urging the president to take forceful action against Syria.
McCain said Sunday the U.S. should go beyond limited air strikes to include the threat of removing Syrian President Bashar al-Assad from power.
Some members of Congress have taken the opposite view, questioning whether the military should be involved at all.
U.S. officials briefed some lawmakers Sunday on intelligence showing the Syrian military dropped poison gas on civilians outside Damascus last month, killing more than 1,000 people.