On Tuesday, the court announced it will take up a case challenging limits on how much individuals can contribute directly to candidates or political parties within an two-year election cycle.

The Supreme Court's Citizens United ruling, allowing unlimited campaign spending by corporations and unions, is three years old. New York is taking the lead in trying to make donors more transparent.

Revisiting the issue of money and its role in politics in this country.

Why it's so tough to expose super PAC mystery donors.

How a candidate staffs his campaign says a lot about the candidate. How the campaign spends money can mean the difference between winning and losing.

A Democratic super PAC goes after Rep. Connie Mack for past legal troubles by comparing him to actor Charlie Sheen.

Republicans attack Obama over Bain cancer ad

Karl Rove's Crossroads hits Democratic Senate candidates in Montana, Missouri, others

Americans for Prosperity launches first ad of $25 million campaign

Former steel mill worker links wife's cancer death to Bain buyout