Republican presidential candidate Rep. Michele Bachmann acknowledged earlier this week that she suffers from chronic migraine attacks, a familiar problem for the 36 million other Americans that experience them. But some people are now speculating as to whether or not Bachmann's migraines might interfere with her ability to do her job. This kind of talk could amount to a minor setback for Bachmann's campaign, considering some polls show she's the front runner for the Republican bid for president. Molly Ball, national politics reporter for Politico, has been following developments in Washington and on the campaign trail.  Dr. Stephen Silberstein, professor of neurology and director of the Jefferson Headache Center in Pittsburg, explains how migraines work and the latest treatment options for sufferers.