Trump has changed his mind about since becoming a presidential contender.

Donald Trump has built a political brand on his willingness to say just about anything that comes to mind at a given moment -- relying, he says, on his "gut." Sometimes that means contradicting himself on fairly basic ideas and sentiments, like as recently as Tuesday about whether or not crying babies are fun to be around (Hint: less so over time).

The Republican nominee has no monopoly on broader policy reversals -- though he has certainly adjusted his position as much as anyone -- but it is his remarkable agility to pivot in really tight spaces that continues to stun and frustrate opponents.

Here are a few things Trump has changed his mind about since becoming a presidential contender.