As the Obama administration moves ever-closer to a possible military strike on Syria, members of Congress are demanding they at least have a say in the decision — with some pressuring President Obama to first seek their approval.

It’s unclear whether the demands would slow down the administration, as it begins to build the public case for a military strike. One Defense official told Fox News that a U.S. strike is “not a matter of if, but when.”

White House Press Secretary Jay Carney stressed Tuesday afternoon that the president has not yet decided to authorize the use of military force. But he made a legal argument for doing so, saying that the United States and 188 other nations are signatories to a chemical weapons convention opposing the use of such weapons, and that there must be a response to a clear violation of those terms.

Officials have indicated the intelligence documents implicating the Assad regime might be released as early as Tuesday, but the administration has not yet made them public.