Donald Trump Takes On Marco Rubio on Twitter

Trump is going after the Florida senator on social media.

After last night's Republican debate, where Rubio seemingly unloaded his oppo playbook on Trump, Trump decided he wasn't playing nice any longer.

He attacked the Florida senator on Twitter this morning, calling him a "lightweight," "Mr. Meltdown" and "a choker."

On Tuesday, in Sparks, Nevada, Trump called Rubio "a nice young man" but warned, "I can’t hit him, he has not hit me, when he hits me -- Ugh he’s gonna be hit."