Chris Christie, 60, known for his combative style, has registered his candidacy with the Federal Election Commission (FEC) He joins an arena already full of right-wing White House contenders, such as Florida Governor Ron DeSantis and former Vice President Mike Pence. Chris Christie is scheduled to make a public announcement Tuesday night in the state of New Hampshire.

He has already begun to attack Donald Trump, suggesting that the Republican favorite, according to opinion polls, was "afraid" to debate with serious opponents.