Donald TrumpDonald TrumpTrump defends Taiwan call: President called me Bergdahl asks Obama for pardon Old fashioned jawboning keeps 1,000 Carrier jobs in Indiana MORE is capping off a dramatic day of intense attacks against Republican primary rival Marco RubioMarco RubioThe ignored question: What does the future Republican Party look like? Graham to roll out extension of Obama immigration program Trump and Cuba: A murky future MORE with a rally in Oklahoma City, Oklahoma. 

Earlier Friday, the GOP front-runner was endorsed by former White House candidate Chris Christie. The New Jersey governor is expected to stump for Trump in the lead-up to next week's Super Tuesday contests.