“Chris called up out of the blue and said, ‘You’re the one that’s going to win.’ ”
Trump hinted he had thought about skipping another GOP debate, but decided not to.
Christie says Trump will make America a leader around the world again.
Trump is speaking to supporters in Fort Worth, Texas.
Viral video-makers "Diamond and Silk" questioned Rubio's sexuality on CNN.
"I got along with everybody. You get along with nobody," Trump told Cruz.
Trump has 37 percent support in seven states, with Rubio and Cruz at 20 percent each.
Campaign adviser Terry Sullivan discussed the plan at a closed-door meeting in Manhattan.
The super-PAC says the GOP needs Carson on the ticket to do respectably with minorities.
Trump has gone after Romney since the 2012 GOP nominee raised questions about Trump's taxes.