Where is all the accountability for the war, corruption, incompetence, etc.?

Trump referred this morning to "OUR TRANSACTION WITH IRAN." This is, of course, interesting because the last time the United States struck a deal with Iran involving a transaction, Republicans completely lost their minds even though that transaction was reasonable. Remember that? We still have a Congress in the United States ... right? Any kind of "transaction" with an extremist, non-democratic regime that is hostile to the United States is supposed to be reviewed by Congress. Now would be a good time for leaders in Congress to speak out & demand all the receipts. The Trump regime just spent hundreds of billions of dollars and at the cost of lives of American soldiers and innocent civilians all to strike a deal with a regime to open a strait that was already open before the needless war. There should be accountability for all of this. Where is it?