The Democrats need to play hardball here and outright refuse to work with the Republican Party as they are unfit to govern. All Democratic Presidential candidates should be required to sign a pledge saying they will not invite any Republican Congressional leaders to the White House for the next 4 years, acknowledge any questions shouted by them during the State of the Union, make any eye contact with any of them in passing, and automatically veto anything they try to sponsor. It's time to really drill this issue to the forefront of the news cycle how truly incompetent and unworthy of anyone's respect these people are.
Then quit calling yourself a republican.
King's never been a national Republican. He's explained this several times.