Ouch. Looks bad for Trump after his threat to spill the beans on Heidi. The political snitch is probably in Hillary's camp.
Yup. It's pretty obvious what this is in response to.
It's a moot point, though. I don't think Donald Trump is of "questionable" character. There's not much to question. He doesn't try to hide the fact that he's a low life. Putting up pictures of his wife posing unclad on a magazine cover isn't showing anything new about him that people don't already know and not care about. Cruz has much more to lose, being as he portrays himself as an upstanding person. Trump doesn't bother with that, nor is he aiming for that angle.