There is evidence.
Fox has stated how it prepares questions. They threw this together in a few hours after Romney made a speech, and they used points from the speech.
Romney doesn’t like Trump is not ‘breaking news’.
They coordinated their attack with Romney’s.
Unethical
You do realize that Romney is not a candidate, don’t you? A news organization talking to a public figure before a debate is not a scandal.
Seriously, why is it so hard to accept that Trump will face hard questioning?