Christie's endorsement of Trump — which follows consecutive wins in the Nevada caucus, and primaries in South Carolina and New Hampshire — may indicate Republican politicians are reconciling themselves to the fact that the businessman is in a strong position to become the party's standard-bearer.
"He'll provide strong, unequivocal leadership, he will do what needs to be done to protect the American people first and foremost, both in the homeland and in creating jobs for this country, and he will make sure that people around the world know that America keeps its word again," Christie said of his one-time competitor. "Donald Trump is someone, who when he makes a promise, he keeps it."
Christie added that Trump is the candidate Democratic front-runner Hillary Clinton and former President Bill Clinton fear the most: "They do not know the playbook with Donald Trump because he is rewriting the playbook."
"He is rewriting the playbook of American politics because he's providing strong leadership that's not dependent upon the status quo," he added.
Christie concluded his endorsement by thanking Trump "for being willing to step out of the private sector and come and offer himself for public service and for leadership in this country at a time when our party and nation so desperately needs it."
The Democratic National Committee said Christie's endorsement was "the best example yet that the GOP is the party of Trump."
"The Republican field just isn't serious and all its candidates have major problems heading into November," DNC National Press Secretary Mark Paustenbach said in a statement. "If anyone is wetting their pants, as Rubio suggested today, it's the Republican establishment. This is yuuge."