When retired Gen. John Kelly joined the White House as President Trump's chief of staff a year ago, he tried to impose some order, restricting access to Trump, pruning disruptive aides, and urging the president to place his calls through the White House operator, for example.
The commitment would provide stability for a White House staff that has seen high turnover, unless either Trump or Kelly changes his mind.
Kelly, who hit his one-year mark in the White House on Monday, had been expected to step aside as early as this summer.
Still, Trump is known as a mercurial boss, whose feelings on key staffers can shift rapidly.
The president later mentioned his top aide's service on Twitter with a photo of the two men smiling and standing side by side. Over the weekend, Kelly marked one year as White House chief of staff. "Kelly is essentially calling Trump's bluff", says Sherman.
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However, the June 12 summit between Trump and Kim led to an immediate easing of tensions. East Coast, officials told The Washington Post Monday on condition of anonymity.
But for this president, keeping Kelly around offers the best of both worlds: somebody to blame when things go awry but nobody fettering his freedom of action.
Kelly has often joked publicly about how working for Trump is the hardest job he's ever had, including those on the battlefield. At the time, Kelly made clear to confidants that he had no plans to leave, though he had also told people close to him that he'd be happy if he made it to the one-year mark.
If Kelly stays on into 2019, he'll occupy the role during a re-election cycle, which is likely to downsize what already is a weakened role for him.
Asked in June about the speculation surrounding Kelly's future, Trump said the two were "getting along very well".
A senior administration official confirmed Kelly's announcement, first reported by The Wall Street Journal.