Scott Walker's Labor Day Weekend: Union Bike and Anti-Union Message

The anti-union label that brought the Wisconsin governor headlines and donors hasn't been doing the trick on the campaign trail.

Scott Walker, governor of Wisconsin, greets an attendee as he arrives at Big Barn Harley Davidson in Des Moines, Iowa, U.S., on Saturday, June 6, 2015. Iowa Senator Joni Ernst is hosting the inaugural Roast and Ride event which featured a 38-mile ride from a Des Moines Harley Davidson dealership to the Central Iowa Expo where seven current and potential Republican presidential candidates are expected to speak.

Photographer: Daniel Acker/Bloomberg

For Scott Walker, Labor Day is a reminder of the issue that brought him to the national stage.

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