Who would you say (as specific as possible) consists of the GOP establishment.
And more importantly, as of now (post-election), where do they stand on Trump?
edit: Changed elite to establishment, used wrong terminology
This is a complex question, because there are no official membership cards for "the GOP establishment". It's a collection of individuals with their own beliefs and opinions, which they do not necessarily reveal to the public.
In general terms, we can define members of the GOPE as having seniority: They hold, or have held, positions of importance for a considerable length of time. Important sub-groups include:
Long-serving members of the Senate or House: Orrin Hatch, Lindsey Graham, Bob Corker, Mitch McConnell, Paul Ryan.
Former presidents or presidential nominees: Bush 41, Bush 43, Mitt Romney, John McCain.
Former high-ranking administration officials: Dick Cheney, Condoleeza Rice, James Baker, Henry Kissinger.
Experienced current or former state governors: John Kasich, Jeb Bush.
As such, the Establishment is (small-c) conservative in its beliefs. It excludes more radical sub-groups, including the Tea Party faction in the House of Representatives, Senators such as Ted Cruz, and Trump himself.
Many individuals in the above list have expressed significant hostility to Trump, for reasons of:
Style: Trump is a brash and vulgar individual. Many Trump supporters see this as a virtue; but it conflicts with GOPE ideas of dignity and decorum.
Policy: Trump's policies might be described as populist-nationalist; his support of such ideas as a Muslim travel ban, border wall, massive spending on infrastructure, and limited engagement with other countries, is in conflict with traditional GOPE priorities.
Principle: Trump's breaks with established moral norms are too numerous to list here, but include attacks on the principles of a free press and independent judiciary. In addition, Trump is under investigation by a special prosecutor for some very serious issues.
However, Trump is now POTUS whether the GOPE likes it or not.
Among current office holders, there are two major types of reaction:
Working with Trump, in an attempt to find areas of common ground and/or advance their own agendas.