A Texas Republican lawmaker said the evidence he saw Sunday at a classified briefing showing the use of chemical weapons by Syria's government was thin.

"Yes, I saw the classified documents yesterday. They were pretty thin," Rep. Michael BurgessMichael Clifton BurgessOvernight Health Care: Trump officials move to expand non-ObamaCare plans | GOP fails to block DC individual mandate | Ebola returns to Congo Republican chairman wants FTC to review mergers of drug price negotiators Overnight Health Care: Official defends suspending insurer payments | What Kavanaugh's nomination means for ObamaCare | Panel approves bill to halt employer mandate MORE (R-Texas) said.

He then said a case could be made that Syrian President Bashar Assad's government wasn't the side that used chemical weapons.

"The case can be made that actually Assad was the one that pulled the trigger is suspect," he said.

The Obama administration says its evidence leads it to conclude Assad's government used chemical weapons against its opponents in the Damascus suburbs. Obama has asked Congress to authorize a military strike because of the use of chemical weapons.

Syria's government has said groups backed by Turkey, the U.S. and Saudi Arabia are behind the use of chemical weapons.

Burgess said he believed a vote on authorization would fail if it were taken today. He said it was clear that both parties are divided on the issue at Sunday's classified briefing.

He also said he doesn't understand why Syrians don't rise up and topple Assad.

"It's not that he attacked another country, it's not that he attacked an ally, he did this to his own folks," he said. "I don't understand why they don't rise up as one and eliminate him from his position in leadership. It seems that would be the logical thing to happen."

He argued launching a couple U.S. cruise missiles won't accomplish much.