Why Did Trump Drop the Cruz Attacks?

RUSH: Everybody's stumped today.  Everybody's stymied.  Everybody's curious.  Can't figure it out.  All of a sudden Donald Trump says he doesn't want to criticize Cruz anymore.  All of a sudden Donald Trump says (paraphrased), "Yeah, you know what? I like Ted! I might even have him as my vice president if I get the nomination."  "But, wait a minute! Everybody says you're thinking of suing him 'cause he's from Canada. What the hell's going on?"