Hey, I’m just correcting your timeline. You said that Nixon was gone when the act was passed, when in fact he was in office nearly a year more. Beyond that, rave on. The Paris Peace Accords had long been signed. Do you really think that NIxon was going to introduce troops back into Vietnam after they’d all been withdrawn? And frankly, the Case-Church amendment, passed with a veto-proof, bipartisan vote had more to do with Vietnam than the War Powers Act did.
Nixon didn't have to re-introduce troops - he launched the B-52s from Guam and Thailand and the carrier aircraft against the NVA columns in 1973 and crushed their Easter Offensive. (So much for the NVA and living up to the Paris Peace Accords...)
Nixon was the only one hanging on to our obligations and the NVA and their supporters here knew that. That's why the campaign to get him out of office, not any sudden surge of morality in our government.