That whole "collaboration" thing is horseshit.
GoP polticians have no intention of collaborating. AOC hit the nail on the head after the supreme court confirmation: "Republicans do this because they don*t believe Dems have the stones to play hardball like they do, and for a long time they*ve been correct."
Biden's speech was just proof that they're right. It was a green light to Moscow Mitch to walk all over his administration.