The White House kept it quiet until now, but on Friday the President nearly blocked the Vice President from getting his chosen national security adviser.

Why this matters: It’s a highly unusual event, as Trump typically gives Pence a long leash on personnel appointments. This is the first time the President has tried to block Pence from filling a senior staff position. The scene also highlights — once again — the extraordinary importance Trump places on personal loyalty.

Inside the West Wing: Trump was furious when he learned Pence was bringing on Nikki Haley’s deputy Jon Lerner, according to three sources familiar with the events. The President believed Lerner was a card-carrying member of the “Never Trump” movement because Lerner crafted brutal attack ads for Club for Growth’s multimillion-dollar anti-Trump blitz during the Republican primaries.