FORT WORTH, Texas — Republican presidential candidate Donald Trump on Friday received the high-profile endorsement of New Jersey Gov. Chris Christie, who called the billionaire the best candidate in the field.

“I’ve gotten to know all the people on that stage, and there is no one who is better prepared to provide America with the strong leadership that it needs both at home and around the world than Donald Trump,” Christie said during a press conference with Trump here in Fort Worth.

Christie said that he believes the party needs to elect the best candidate to beat Democratic front-runner Hillary Clinton. Christie said Trump is “undoubtedly” the best person for the job and said he “is rewriting the playbook of American politics.”

Trump, who stood smiling next to Christie as the governor gave his endorsement, called it “a very big endorsement.” He added that the endorsement means a lot to him and his campaign, calling it “the one endorsement” that he wanted most.

“Donald Trump is someone who when he makes a promise, he keeps it,” Christie said. “No one is going to get inside this guy’s head. There is no better fighter than Donald Trump.”