What's to disagree with? They CAN easily refuse to fund a war; they did it with the Vietnam war.
If they try to refuse to fund the war, the President should tell the traitors in Congress to go to Hell.
Surround the Capitol with troops and "invite" the Congress to dissolve itself.
After all, this Democratic win - in terms of the war - is fundamentally illegitimate. The House is close enough for Moslem votes to have turned it.