Because I assume #Trump knew this war on #Iran would make his odds of Republicans losing the midterms badly much more likely, I've got two guesses at why he did it.

He thinks being at war can be turned into justification for cancelling the elections.

Israel has some really bad shit they were blackmailing him with related to the #EpsteinFiles.

Maybe both but otherwise I do not understand it. He can't think it will go well, could he?