WASHINGTON (CBSNewYork/AP) — Former New Jersey Gov. Chris Christie took himself out of contention for White House chief of staff on Friday as President Donald Trump’s chaotic search for a new chief inched forward .

Christie cited family reasons in a statement saying that he was asking Trump to remove him from consideration. He had met with Trump on Thursday to discuss the job, according to a person familiar with the meeting who was not authorized to discuss it publicly.

Christie competed against Trump for the Republican nomination for president in 2016. He went on to become a staunch supporter, ultimately running Trump’s transition team.

Prior to becoming governor, Christie was a U.S. Attorney in New Jersey from 2002-2008.

Sessions was forced out by Trump Wednesday, less than 24 hours after the midterm elections.

Christie’s departure is the latest twist in a search triggered when Trump’s preferred candidate to replace John Kelly bowed out. Speculation has swirled around an array of Trump associates, prompting some to distance themselves from the job.

When former House Speaker Newt Gingrich visited the White House this week, he insisted it was merely to see the Christmas decorations.

The wild process is hardly a novelty for the Trump administration, which has struggled with high staff turnover and attracting top talent, but it underscored the tumult of Trump’s Washington.

In past administrations, chief of staff was a sought-after job, typically awarded after a careful process. Now, many view the job as a risky proposition, given Trump’s propensity for disorder and his resistance to being managed.

For his part, Trump insisted Thursday that the process is moving along.

“We’re interviewing people now for chief of staff,” he said, adding that the short list is now “five people. Really good ones. Terrific people. Mostly well-known, but terrific people.”

He announced Friday night that Director of the Office of Management & Budget Mick Mulvaney would serve as the Acting White House Chief of Staff until a permanent appointment was made.

The president’s hunt for a new chief reverted to square one over the weekend when Nick Ayers, Vice President Mike Pence’s chief of staff, took himself out of the running and decided that he would instead leave the White House. The announcement surprised even senior staffers who believed that Ayers’ ascension was a done deal.

Trump then turned to a list of other candidates that was said to include Office of Management and Budget Director Mick Mulvaney and Rep. Mark Meadows, R-N.C., the chairman of the conservative House Freedom Caucus. Other possible options mentioned were U.S. Trade Representative Robert Lighthizer and Treasury Secretary Steven Mnuchin, though both signaled they were happy in their current roles.

By Wednesday, Meadows was out of the running, with the White House saying Trump thinks he is needed in Congress.

Throughout the week, a number of other names were floated, including former Trump deputy campaign manager David Bossie, acting Attorney General Matthew Whitaker, White House communications director Bill Shine and press secretary Sarah Huckabee Sanders. It was not clear how many of those options were being taken seriously.

The breadth of speculation provided on-camera time for many to discuss the speculation. Bossie called it “humbling” to be considered while acknowledging that he did not know if it was a serious list of names. Former Pennsylvania Sen. Rick Santorum said on CNN that he would decline the job if offered, though it was never clear he was a serious contender.

Sanders responded Thursday to speculation that Trump’s aide and son-in-law, Jared Kushner, could be up for the job, saying that she was “not aware that he’s under consideration.” But she appeared to leave some wiggle room, adding, “He will be great in any role that the president chooses to put him in.”

According to a person familiar with the matter, people have been reaching out to the president to suggest the idea, but Kushner believes that he can serve the president best in his current role. The person spoke on condition of anonymity to discuss the internal discussions.

A time frame for a decision remained uncertain, with some speculation about the possibility of two people taking over the responsibilities of the chief of staff. And Trump made clear in an interview with Fox News on Thursday that he was still soliciting advice.

“Well, I want somebody that’s strong, but I want somebody that thinks like I do. It’s my vision — it is my vision, after all,” Trump said. “At the same time, I’m open to ideas.”

(© Copyright 2018 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)