Gallup partly attributed this month’s rise to Congress’s general reluctance to authorize force in Syria, which the public has strongly opposed.
The Gallup poll came before the most recent breakthrough that has given hope for a diplomatic resolution to secure Syria's chemical weapons and before President Obama’s national address Tuesday.
In the past week, numerous polls have found the majority of the public is against U.S. intervention in the country after the Obama administration concluded that President Bashar Assad's regime used the weapons against its own people.
Both the House and Senate have delayed votes on authorization and members of both chambers are working on alternate language to take into account Russia’s new willingness to pressure its ally to hand over its chemical weapons.
But before the delay, members of Congress had been coming out against the plan in droves. According to a whip count from The Hill, the plan appeared to be heading for defeat in the House and a tight vote in the Senate.
The Gallup poll surveyed 1,510 adults and holds a margin of error of 3 percent.