During the transition, in what looks in hindsight like a preview of the presidency, one Trump aide got the idea of printing out the detailed checklist of Mr. Obama’s campaign promises from the official White House website to repurpose as a kind of hit list, according to two people familiar with the effort.
“This is personal for Trump; it is all about President Obama and demolishing his legacy. It’s his obsession,” said Omarosa Manigault Newman, an “Apprentice” veteran and, until her abrupt departure, one of the few black officials in Mr. Trump’s West Wing. “President Obama will not be able to rest as long as Trump is breathing.”
When the two men met for a stilted postelection sit-down in November 2016, the president-elect was polite, so Mr. Obama took the opportunity to advise him against going scorched-earth on Obamacare. “Look, you can take my name off of it; I don’t care,” he said, according to aides.
Mr. Trump nodded noncommittally.
As the transition dragged on, Mr. Obama became increasingly uneasy at what he saw as the breezy indifference of the new president and