Friendly advice, Donald: Stop smearing Ted Cruz's reputation

You’re not politically invincible, regardless of the polls and media. I am already hearing more and more people getting fed up with the low road you’re taking against Cruz, which has obviously intensified this morning. You don’t need to attack his honor or attempt to smear his reputation. You can leave that to Mitch McConnell and the New York Times. Engage on real and substantive issues that matter to the country. Like I said, my friendly advice.