Raised voices could be heard through the thick door to the Oval Office as John Kelly - then secretary of Homeland Security - offered some tough talk to President Donald Trump.
Kelly, a whip-cracking retired general who was sworn in as White House chief of staff on Monday, had demanded to speak to the president alone after Trump complained loudly that the U.S. was admitting travelers from Iran, Afghanistan and Haiti.
Kelly first tried to explain to Trump that the admissions were standard - some people had legitimate reasons to visit the country - but the president insisted that it was making him look bad, according to an administration official familiar with the exchange about a month ago.
Kelly then demanded that other advisers leave the room so he could speak to the president frankly. Trump refused at first, but agreed when Kelly insisted.
Tough: Marine General John Kelly insisted on going man-to-man with Trump in the Oval Office and there were 'raised voices' when the door was closed in a row over immigration
Takes no prisoners: Kelly, decorated for his combat experience and the holder of one of the military's most important commands, will not be afraid to stand up to the president
It was an early indication that Kelly, a decorated retired Marine general who served three tours in Iraq, is not afraid to stand up to his commander-in-chief.
Tapped to bring order to a chaotic West Wing, Kelly began to make his mark immediately on Monday, ousting newly appointed communications director Anthony Scaramucci and revising a dysfunctional command structure that has bred warring factions.
From now on, said White House press secretary Sarah Huckabee Sanders, all senior staffers - including the president's son-in-law Jared Kushner and chief strategist Steve Bannon - will report to Kelly instead of the president.
Kelly 'will bring new structure, discipline and strength' to the White House, Sanders said.
'It definitely has the fingerprints of a new sheriff in town,' said Blain Rethmeier, who guided Kelly through the Senate confirmation process for the Homeland Security post.
Rethmeier said that what stood out about Kelly during the time they worked together was the way Kelly commanded respect from everyone he encountered - and the way he respected others.
Kelly drew praise from lawmakers of both parties Tuesday.
Sen. Lindsey Graham, R-S.C., expressed confidence that Kelly can help restore order, saying on NBC's 'Today' show that 'the Marines have landed at the White House. They have a beachhead.'
And Sen. Dick Durbin of Illinois told CNN that Kelly 'is in a position where he can stabilize this White House, that's good for this country. The president has to be part of that.'
Jason Miller, a senior communications adviser during the Trump presidential campaign, predicted on CNN that Kelly's next move will be to put people in place that will help the president. He suggested Kelly should convince ousted press secretary Sean Spicer to stay on, at least through the tax overhaul effort.
Kelly fostered a reputation as an outspoken commander who didn't shy away from unpopular opinions during his military career. Rethmeier said that Kelly also respects authority deeply - 'and that's something that Trump sort of smells out, if you respect him or not.'
'If he disagrees with you, he'll disagree respectfully,' Rethmeier said.
It was a point Kelly made clear during his confirmation hearing in January.
'I have never had a problem speaking