NBC's Chuck Todd says Marco Rubio's counterpunch to Jeb Bush's attack on his Senate voting record could be the moment that makes him the nominee.
CHUCK TODD: This is Marco Rubio's debate. Pure and simple. he's got the viral moment that I want to have. He was put in the spotlight early. Defensive early. He was going to be on the his main rival Jeb Bush decided to go after him. He swung, he missed and Rubio fired back hard. Look, if Marco Rubio end up the Republican nominee, we'll say it began with this debate.