Corbyn was supposed to have changed the Labour party permanently in a UK context, but that can quickly fade after an election defeat convinces the rest of the party that a particular set of policies isn't the winning formula for having lots of jobs for the boys available.
Demographics are shifting across many of the sunbelt and southern states and what happened this time in Arizona and Georgia could be Texas or Florida next time, so there are sound reasons for thinking the Republicans will have to moderate their policies at the federal level to stay competitive.
The silence from many top Republicans could be interpreted as giving Herr Drumpf some extra time to do the decent thing given relatively few senior Republicans (Guiliani, Gingrich and Graham) have been actively backing his electoral fraud narrative. Suspect the slow pace of some of the counting has also been about hoping he would concede graciously and take the heat off, but now they'll just have to plough on regardless and hope they don't wind up with Alex Jones and a posse of gun-totting rednecks outside.