Gov. Chris Christie of New Jersey, a once-commanding figure in the Republican Party who struggled to attract support for his presidential campaign but unsettled the race with his strident attacks on Senator Marco Rubio of Florida, ended his run for the White House on Wednesday.
The decision came a day after Mr. Christie came in sixth in the New Hampshire primary, an embarrassing result after he had focused the bulk of his campaign’s efforts on the state. He was also facing the prospect of being left out of the group that will take the stage at the Republican debate on Saturday because of his poor showings in the Iowa caucuses last week and in New Hampshire on Tuesday.
“While running for president, I tried to reinforce what I have always believed: that speaking your mind matters, that experience matters, that competence matters and that it will always matter in leading our nation,” Mr. Christie wrote on his Facebook page Wednesday afternoon. “That message was heard by and stood for by a lot of people, but just not enough, and that’s O.K.