Rubio laughs off Trump's attack: 'He's a clown'
Marco RubioMarco Antonio RubioOvernight Defense: Tillerson, Trump deny report of rift | Tillerson says he never considered resigning | Trump expresses 'total confidence' in secretary | Rubio asks Army to kick out West Point grad Rubio asks Army to kick out West Point grad with pro-communist posts GOP establishment doubts Bannon’s primary powers MORE on Friday night laughed off an attack from Republican presidential rival Donald TrumpDonald John TrumpIvanka Trump pens op-ed on kindergartners learning tech Bharara, Yates tamp down expectations Mueller will bring criminal charges Overnight Cybersecurity: Equifax security employee left after breach | Lawmakers float bill to reform warrantless surveillance | Intel leaders keeping collusion probe open MORE, calling the businessman nervous in the face of the Florida senator's barbs.
"He's a clown," Rubio said during an appearance on Fox News after host Bret Baier played a clip of Trump's insults at a campaign rally earlier in the day.
"Look, I saw him back stage. He was nervous, he was waving his arms around," Rubio continued, referring to the debate the previous night. "I think it is time to take the mask off of this guy."
Rubio went off on Trump's business record: "He is a guy that portrays himself as defender of the little guy in this country. He has been exploiting working Americans for 40 years."
"When his businesses went bankrupt, the first people who didn't get paid were those small contractors," Rubio said. "He had people that put their confidence in him, signed up for Trump University. Some of them paid $35-36,000 and they got nothing for it because they trusted in his name and got stuck."
Rubio's attack on Trump's record on jobs echoes a similar line of attack used by Ted CruzRafael (Ted) Edward CruzWhatever you think the Alabama special election means, you’re probably wrong This week: Congress gets ball rolling on tax reform Week ahead: Senators work toward deal to fix ObamaCare markets MORE as the pair go after the GOP front-runner heading into Super Tuesday next week, when a dozen states hold voting. 
Rubio's characterization of Trump as a "clown" came after the businessman called him a "lightweight," "nervous basket case" and "a little frightened puppy."
Trump unleashed new endorsement New Jersey Gov. Chris Christie to go after the Florida senator in the increasing war of words.

"Marco Rubio, your campaign is almost over, buddy," Christie said during a rally in Oklahoma City before introducing Trump to the stage, suggesting Rubio was "showing a lot of desperation today."
"Donald Trump represents strength, and Marco Rubio represents Washington, D.C."