Members of Congress don’t govern.
Their job is to sell the company line and fund raise. The lobbyists and Congressional staff decide which issues to push, then write any necessary legislation.
So even if they can’t recognize their own mother, as long as they can press that Yea or Nay button, they are competent enough for Uni-Party work.
Plenty of Congress are just stupid, so it might be harder to guess than one might think.
Probably some obscure old folks in the House like Don Young or Sam Johnson. Too many senators act like it, so it’s impossible to tell.