Republican presidential front-runner Donald Trump on Sunday slammed rival Ted Cruz for the recent ad produced by an anti-Trump super-PAC featuring a photo of Trump's wife posing nude. "From what I hear, he and his campaign went out and bought the cover shoot. Melania did a cover story for 'GQ,' a very strong modeling picture. No big deal," Trump said on ABC's "This Week." "But it was a cover story for 'GQ,' a big magazine. And it was, you know, fine. And from what I hear, somebody bought the rights to it and he was the one or his campaign...