Marti Mikkelson

It's been more than two years since Wisconsin Gov. Scott Walker signed a bill stripping collective bargaining rights from most public employees. The new law sparked massive protests at the Wisconsin State Capitol because many saw it as an attack on unions.

While most demonstrators eventually went away, a small group did not. They arrive at the building most weekdays to sing anti-Walker and pro-union songs.

On a recent day, more than 100 people were gathered in a circle on the Capitol lawn, tapping cowbells and singing a localized version of "This Land Is Your Land."