Every White House has its factions, with officials vying for the best titles, the biggest staffs, the most time with the president, and the most prime real estate in the cramped warrens of the West Wing. But none had ever been torn apart by tribal warfare as intense and toxic as Trump’s White House. It was personal, it was political, it was philosophical. And from the very start, it was all-consuming. The polarization that Trump encouraged in the outside world, he fostered inside his own building too.

