The Speaker of the House sketched out the new rules very clearly:
"If the president wants to add to this mission, he is going to have to justify it," said Pelosi, speaking to host Bob Schieffer. "And this is new for him because up until now the Republican Congress has given him a blank check with no oversight, no standards, no conditions. And we’ve gone into this situation, which is a war without end, which the American people have rejected."
"If the president chooses to escalate the war, in his budget request we want to see a distinction between what is there to support the troops who are there now. The American people and the Congress support those troops. We will not abandon them."
Annoyingly, Senator Joe Biden demonstrates he's not a team player.