Rubio: Trump Is Not ‘Making Stuff up About Me’; Ted Cruz Is

RUSH TRANSCRIPT:
TAPPER: "Can I ask you why you seem more focused on Senator Cruz than you are on the front-runner, Donald Trump?" 
RUBIO: "I'm not focused on Senator Cruz but I have to respond to the things he says. Every single day he makes something up about me. If I don't respond, people might assume that it's true. You can't leave things that aren't true unchallenged. Donald Trump is not out there every day making stuff up about me. I have differences of opinion about Donald Trump. On Saturday night Donald Trump said that 9/11 happened under George W. Bush's watch and I challenged him on that. But Donald Trump is not out there every day making stuff up about me. Ted Cruz is. So we can't leave that unchallenged. If you do, then basically you're admitting that it's true in the eyes of some voters. This election is too important to allow that to happen."