White House Shake-up ContinuesPresident Donald Trump has drawn several steps closer to his long-teased major White House shake-up as he gears up for the twin challenges of battling for re-election and dealing with the Democrats’ investigations once they take control of the House. Trump confirmed Saturday that Chief of Staff John Kelly would leave his job at the end of the year, and he announced Friday that he was picking a new U.S. attorney general and a new ambassador to the U.N. At the same time two senior aides departed the White House to beef up his 2020 campaign. Trump has hardly been shy about his dissatisfaction with the team he had chosen and has been weighing all sorts of changes over the past several months. He delayed some of the biggest shifts until after the November elections at the urging of aides who worried that adding to his already-record turnover just before the voting would harm his party’s electoral chances. Now, nearly a month after those midterms, in which his party surrendered control of the House to Democrats but expanded its slim majority in the Senate, Trump is starting to make moves. He didn't say who would replace Kelly, a retired Marine general who has served as chief of staff since July 2017. But according to nearly a dozen current and former administration officials and outside confidants, the president has begun telling people to contact the man long viewed as Kelly's likely successor. “Give Nick a call,” Trump has instructed people, referring to Vice President Mike Pence’s chief of staff, Nick Ayers, according to one person familiar with the discussions who spoke on condition of anonymity. Trump announced Friday that he’d nominate William Barr, who served as attorney general under President George H.W. Bush, to the same role in his administration. If confirmed, Barr will fill the slot vacated by Jeff Sessions, who was jettisoned by Trump last month over lingering resentment for recusing himself from overseeing special counsel Robert Mueller’s Trump-Russia investigation. Trump also announced Friday that State Department spokeswoman Heather Nauert was his pick to replace Nikki Haley as U.S. ambassador to the United Nations. All this came the same day that Trump’s re-election campaign announced that two veterans of the president’s 2016 campaign, White House political director Bill Stepien and Justin Clark, the director of the office of public liaison, were leaving the administration to work on Trump’s re-election campaign. “Now is the best opportunity to be laser-focused on further building out the political infrastructure that will support victory for President Trump and the GOP in 2020,” campaign manager Brad Parscale said in a statement. The moves had long been planned, and will give Kelly’s eventual successor room to build a new White House political team. Ayers, who is a seasoned campaign veteran despite his relative youth — he’s 36 — has the backing of Ivanka Trump and Jared Kushner, the president’s daughter and son-in-law and senior advisers, for the new role, according to White House officials. But Ayers has also faced some resistance. During Trump’s flight home from a recent trip to Paris, some aides aboard Air Force One tried to convince the president that Ayers was the wrong person for the job, according to two people familiar with the matter. Trump and Kelly’s relationship has been strained for months — with Kelly on the verge of resignation and Trump nearly firing him several times. But each time the two have decided to make amends, even as Kelly’s influence has waned. Kelly was brought in to try to normalize a White House that had been riven by infighting. And he had early successes, including ending an open-door Oval Office policy and instituting a more rigorous process to try to prevent staffers from going directly to Trump. But those efforts also miffed the president and some of his most influential outside allies, who had grown accustomed to unimpeded access. And his handling of domestic violence accusations against the former White House staff secretary also caused consternation, especially among lower-level White House staffers, who believed Kelly had lied to them about when he found out about the allegations. Kelly, too, has made no secret of the trials of his job and has often joked about how working for Trump was harder than anything he’d done before, including on the battlefield.