With their new trifectas in Pennsylvania, Michigan, Arizona, Wisconsin and Nevada, Democrats could sign onto the National Popular Vote Interstate Compact, in which states give their electoral votes to whoever wins the nationwide popular vote. All five of those states haven’t yet signed; the 19 that have possess 222 of the 270 votes needed to win the presidency. The additional states would activate the Compact. Some states might decline, bellyaching over losing their place of prominence in picking the president, but that would be irritatingly myopic: of the five presidents who won while losing the popular vote, four were Republicans.
Talk about historic.
It would only be a viable agreement as long as 270 electoral votes remained in the hands of Democrats. Realistically the way this would play out is that the first post-compact election would be mired in legal challenges, and then by the next election at least one state would probably pull out, having lost its Dem majority, and that would be the end of it until the next blue wave. But it could possibly be a bulwark for one presidential election.