The minimum wage fight, explained

President Obamas call in his State of the Union address to bump the federal minimum wage up to $9 an hour has directed new attention to a politically divisive issue. And its already triggered a new round of criticism by congressional Republicans who dont agree with the president.
To better anticipate the direction of the current debate, its helpful to look at the history of the federal minimum wage law, how lawmakers have addressed the issue in the past and who is for and against raising it in the...