Does Rubio Really Have Momentum?

Nate Silver: “If anything’s happening, it seems to be confined to Iowa. Rubio has lost a few points, not gained them, in New Hampshire. And his national polls have been flat.”

“There’s also a conspicuous sign that Rubio doesn’t have momentum. Despite being the sort of candidate who should have appeal to ‘party elites,’ Rubio hasn’t received any endorsements from current governors or members of Congress since Sen. Jim Inhofe endorsed him on Jan. 9.”