If you had any doubt that Sen. Elizabeth Warren has her eye on the White House, it was dispelled this past weekend when she showed up on the Sunday morning talk shows to say she wasn’t running for president.

By issuing a deliberately non-Shermanesque denial, Warren signaled her strong interest in 2020. But while the former law professor has learned to speak Washington doubletalk like a native, her other tribal connections — or lack thereof — may yet trip her up.