Spin Cycle

On the O-mentum front:

Obama is getting two big labor endorsements, from the 1.5 million member Service Employees International Union and the 1.3 million member United Food and Commercial Workers.

You never know how much that matters, how much effort they put on the ground. But in blue-collar battlegrounds like Ohio, Wisconsin and Pennsylvania, it can't hurt.

Also: Some significant movement on the superdelegate front, as AP reports a couple of Clinton backers shifting to uncommitted, a couple more shifting to Obama and another very prominent Clinton backer -- civil rights leader Cong. John Lewis (left) -- musing about a switch.

AP calls it a "fresh sign of trouble" for Hillary: "Clinton's recent string of eight primary and caucus defeats coincides with an evident shift in momentum in the contest for support from party officials who will attend the convention."

But you still have to remember: If she wins Ohio and Texas, where she leads, none of it matters.