They'll change their tune either when:
1. Trump finally reverses course and concedes;
2. Biden is inaugurated and his presidency becomes a fait accompli;
3. Never.
Probably gate #3.
The persistence of birtherism (and Trump's rise by being willing to go there) proves that there is virtually no limit to huge numbers of Republicans sustaining a belief that a Democratic President is fundamentally illegitimate.
If Hillary had won in '16, it would have been the same, but for some different reason. Or maybe the same one. Trump cried voter fraud even ***after*** he won in '16 so he sure would have done so then as well.
