He pulled out the Trump card -- in the looks department.
"I watched someone on [MSNBC's 'Morning Joe'] this morning...He's fawning over him. He says how handsome he is," Trump said.
"I don’t know, I think I’m better looking than he is."
Trump also called the Florida senator overrated.
“He runs for Senate, and now he wants to be president. I would say -- maybe I’m the last person to say this: Relax, take it easy, take it easy,” said Trump. “I think he’s highly overrated, I think he’s an overrated person, I’ve called him a light weight. I think he’s a light weight – I hope I’m wrong about that.”
He also said that Rubio “is probably a nice person,” but he should have been more loyal to his former mentor Jeb Bush, who Trump describes as “low energy.”
“I was told that he would never run because Bush was his mentor...I said ‘alright’ because…I’m an extremely loyal person…to a fault, frankly... He was very, very disloyal to Bush – I don’t like that,” Trump said.
Rubio's camp did not immediately respond to a request for comment.