Patty Murray is widely acclaimed as the stupidest of all 100 Senators! I would say she is as dumb as a box of rocks, but that would be insulting rocks!
Maizie Hirono would like a word. Now, as a born and raised Washingtonian I can’t disagree too much with your assessment, and certainly prior to the arrival of Hirono you would have been correct, but now we have a real horse race between the two.