Debate takeaways: Ted Cruz, Marco Rubio mix it up, as do Jeb Bush, Donald Trump
Nine Republican presidential candidates took the stage Tuesday night for a debate that focused almost exclusively on foreign policy. But the gathering of White House hopefuls in Las Vegas shaped up as a pair of mini-match-ups: One debate unfolded between the 44-year-old senators, Ted Cruz of Texas and Marco Rubio of Florida. And in a surprise rumble, former Florida Gov. Jeb Bush went hard after billionaire real estate mogul and GOP front-runner Donald Trump. And Trump, by the way, promised…