We saw this long ago.
It is why some of us said that Trump is simply Hillary's Trojan Stalking Horse.
The Establishment Oligarchy embraced him because he was indeed going to kill Conservatism from within their party - which is what they and the Doles/Priebus/McConnells have wanted for a long time.
In this the Democrats and the GOP Ruling Class had a common enemy they were happy to use Trump to bury and silence.
Their hope was that Conservatives would remain in enough numbers to vote for Trump because Hillary was worse. I think they grossly miscalculated, but that is no surprise because they are not called the Stupid Party for nothing. They became relaxed when it became clear their gravy train Fascism was not going to be threatened by either Hillary or Trump, and they hopped on the train.