I don't think that's true. She's been clear for a long time that she liked them both. If she picks one she thinks will be the better candidate, only those who demand she should have picked their preferred candidate will see it as a betrayal.
Conservatives support Ted Cruz over Donald Trump. There are those, as Rush Limbaugh says, who don’t care if Trump is a conservative because they want to believe he’s going to build the wall, enforce our borders, ban Muslims, etc. However, Trump’s record is clear...he’s a crony capitalist, New York liberal. He’s playing these nervous nelly’s for fools. Trump’s early supporters either never were conservative, or abandoned their conservative principles out of pure panic and desperation, even though they have a solid conservative running in second place...and who is the number one second choice in virtually every poll.