Presidents should know not to mess with Bob Woodward. The Washington Post journalist got a rude awakening last week when he called an aide to President Obama to warn that an article he was writing would question the president's account of the sequester's origins. Woodward said he was yelled at for over an hour, then received an apology email that said "I think you will regret staking out that claim." The White House denies it was a threat. “They have to be willing to live in the world where they’re challenged,” Woodward says. “I’ve tangled with lots of these people ... I don’t think it’s the way to operate."