Obama Slams GOP Presidential Candidates In Boston Speech As Anti-Union

UPDATE 5:40 p.m. EDT: Wisconsin Gov. Scott Walker responded to the president's taunts, saying the issue is freedom. "What we did was ultimately about giving people the freedom to choose whether or not they want to be in a labor union or not through right to work. That's pro-worker," Walker said.

Walker did not respond directly to the criticism about comparing his union-busting tactics to handling the Islamic State group or comment on the state's inability to generate the number of jobs he predicted would follow the right-to-work push.