My definition of a flip-flop is not when someone has new or additional information and changes their opinion based on it.
Even as late as March 2015, commentators were discussing whether Cruz was eligible. So, if Trump thought Cruz would have problems back in December 2014, so did a lot of people. Since then, the folks who seemed concerned are satisfied and Trump happens to be one of them. How does that make a flip-flop?
Does this apply to all politicos, or just Trump?