People who identify as Republican would have voted for Trump regardless because the Democrats and Kamala/Biden are socialists and will bring about the end of the American way of life :).

That said about 50% of those voters accept that Biden has a mandate albeit grudgingly but the other 50% are lunatics who think has Trump won, will serve a second term on March 4, that 1776 constitution is a thing and QAnon is maybe on to something.