Republicans control the Wisconsin state Senate 19-to-14, but it takes 20 votes to act on fiscal matters. So Democratic state senators have crossed state lines to prevent a vote on Republican Governor Scott Walker's plan to strip public employees of collective bargaining rights. On Wednesday, President Obama invited a Wisconsin TV reporter for a White House interview, so he could comment on the dispute. Is the President taking the issue nationwide? Steven Greenhouse, author of The Big Squeeze: Tough Times for the American Worker, covers labor issues for the New York Times.