The #NeverTrump crowd has to ask themselves this: If Trump is the Republican nominee, are they willing to go all the way to vote against him.
That's the definition of #NeverTrump, yes. As distinct from the people who have been trying to stop Trump from getting the nomination, but have never ruled out voting for him in the general election.
AFAIK, no one prominent who's actually #NeverTrump (that is, who's been saying that they'll vote against Trump in the GE) has yet doubled back on that commitment and said that they're willing to vote for Trump in the GE after all.
Rubio issued several "#NeverTrump" tweets during his campaign at one point, and is now saying he'll probably support Trump in the general.
EDIT: Here's one:
https://mobile.twitter.com/marcorubio/status/703583966973075457
