That wasn't GOP driven, but Trump driven. Mny in Congress now rode in his wave. It was Trump, not the GOP that generated a wave of voters.
The need for a new party needs serious consideration. It would have the potential to draw conservatives, libertarians, independents; even ex-democrats and liberals. Sorry, but the GOP just can't do that.
All true.
But...if you create a new party, and the rump GOP manages to keep even 30% of the old Republican vote, just how many seats do you think we are going to win in a country where the electorate is evenly divided between the Republicans and the Dems? You split the Republican votes and the Dems win by default.