"The Syrian regime [will] not get a strategic or tactical advantage" as a result of the ongoing debate on Capitol Hill over military options in the region.
U.S. forces were poised to strike in late August in retaliation for reported chemical strikes by Assad's forces against anti-government rebels in the country.
Use of those weapons crossed a so-called "red line" with the administration, triggering plans for military action.
But Obama delayed the attack in order to allow Congress to vote on authorizing military action in Syria.
Seeking official authorization from Congress could unify the country behind any effort to strike the Syrian government, according to Obama.
But some lawmakers are concerned that the administration may be running out of time to take decisive military action in the country.
"I think all of us recognize that it is a bit of a strange situation when you come to Congress to [seek] authorization for action you can already take," Sen. Jeff FlakeJeff FlakeTrudeau, Trump speak for second night about US-Canada trade Trump says he may break up 9th Circuit Court after rulings go against him Trump administration weighing order to withdraw from NAFTA MORE (R-Ariz.) told reporters on Capitol Hill Tuesday.
"There are a lot of questions as to why we waited" to take action in the country, he said.
The biggest concern, according to Flake, is efforts Assad's forces are reportedly taking in anticipation of an American attack.
Assad is reportedly moving prisoners taken by his forces to military sites across the country that could be targeted by U.S. missiles.
Syrian troops have already abandoned positions in the capital of Damascus, retreating to underground bunkers and military compounds north of the city.
Former CIA operative Bob Baer told CNN on Sunday the Assad regime could use the delay to launch new offensives against the rebel positions initially targeted in the chemical strikes.
That said, planned U.S. operations against Syria "will be effective tomorrow, or next week, or one month from now, and I am prepared to give that order," Obama said Sunday.