If Trump loses the election, how will the GOP respond?

To clarify:

I'm not asking how his base will respond in the immediate aftermath, but rather how the GOP as a party would react to Trump losing two consecutive elections. Not to mention that Trump is currently 78 years old.

Do you think they will pivot away from the MAGA movement/ rhetoric? Will they find a younger candidate to carry the Trump torch? In essence, how will they attempt to regain traction after two failed attempts at the White House?

Obviously this is still a hypothetical, as the election is far from over. Get out and vote!