Donald TrumpDonald TrumpTime defends reporter over MLK bust Possible US embassy move to Jerusalem exposes facade of two-state negotiations Moulitsas: Reality of not being popular MORE is capping off a dramatic day of intense attacks against Republican primary rival Marco RubioMarco RubioWebb: What matters now is policy McMahon dodges smackdown from Small Business Committee Why the era of US global leadership is over 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.