Mitt Romney, speaking at a National Association of Latino Elected and Appointed Officials conference in Florida on Thursday, has pushed the 2012 electoral battleground into union-friendly territory and put organized labor on the defensive in states it typically has little trouble holding. (Associated Press)

Mitt Romney, speaking at a National Association of Latino Elected and Appointed Officials conference in Florida on Thursday, has pushed the 2012 electoral battleground into union-friendly territory and put organized labor on the defensive in states it typically has little trouble holding. (Associated Press)