Why can't President Trump let anything go? A theory, and a warning.

"President Trump is a man seriously susceptible to snagging himself in the nettles of obsession," and lately "no compulsion has so consumed his psyche, and his Twitter account, as the deeply held and shallowly sourced belief that President Barack Obama tapped his phones," say Glenn Thrush and Maggie Haberman in The New York Times. "So why can't he just let go?" They have four theories, starting with the early influence on Trump from his father, hard-driving real estate developer Fred Trump, and ...