Trump isn't really a Republican, it's just that on some key issues, his position aligns better with the Republican party. The majority of the Republican party was openly anti-Trump in the beginning, then later turned around due to his massive public support.

That hasn't really changed, his approval is as stable as ever. The only people buying into the "failed coup" narrative are the ones that never supported him to begin with. Dropping Trump, as much as the party might want to, is not a recipe for success. Strategically, dividing the Republican party will be the prime objective of Democrats.

It will really come down to what the Democrats do with their current turn in power, The republican party is clearly fractured, if the Democrats attempt to ram through sweeping social and economic changes that appeal to their most authoritarian left base then it will fracture the Democrat party as well

This could be, for the first time since the Wig Party collapsed, that we see an opening for an actual 3rd party to emerge