A friend of John Kelly, President Trump's new chief of staff, says the retired general will bring order and stability to the White House. “He knows how to do this: with common sense and good leadership,” the unnamed friend tells the Washington Post. “He won’t suffer idiots and fools.” Kelly, who spent 45 years in the Marines and was currently serving as the head of the Department of Homeland Security, was tapped by Trump to replace Reince Priebus on Friday. Kelly's friend also offered a hint of how the new chief of staff will handle the leaks that are so vexing Trump's aides: “Simply go dark and do not engage.” Here's what else you need to know about Kelly and his new role in the White House: