@oralloy,
Another way to look at it is that due to Trump's projected loss, there is apparently a growing schism among Republicans, between Trump supporters and traditional conservatives.
Worse case scenario (for them) is Trump and his supporters starting a new political party, which would significantly weaken the Republican Party's chances to win another election.
That is what happened in the 1912 Presidential election: a disagreement on who should be on the ticket led to the Republicans nominating President Taft to run for a second term, while Theodore Roosevelt left the Republican Party and ran under a new party, The Progressive Party.
The result was Taft and Roosevelt split the vote among Republicans, allowing Democrat Woodrow Wilson to win the presidency.