On March 2, three days after the beginning of the war, Hakeem Jeffries went on CNN to explain his objections to the actual policy (https://jeffries.house.gov/2026/03/02/leader-jeffries-on-cnn...). He said that the bombing was justified by claims that aren't true, that there's no justification for a regime change war in any case, and that the practical consequences of the war will be bad for both American strategic interests and the American people.
As he mentions, while you may consider a war powers resolution "milquetoast", it's important to understand that this is the best lever he has available to try and stop the war. It's easy for Hasan to be mean and dunk on hypocritical Republicans, because Hasan's not the one who has to convince hypocritical Republicans to cross the aisle and vote for his bills.