A look at the work of campaign trackers as they follow every step of political campaigns across the country.

An Ohio seat for U.S. House of Representatives is targeted by conservative super PAC that received $2.5 million from Chevron.

A primer on the Supreme Court case that changed the way money could be spent in elections.

Nonprofit social welfare organizations may become more potent political donors than super PACs. And they don't have to disclose who gave money.

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

The New York mayor's new super PAC isn't the first time he's tried to change things nationally and around the world.

About six months ago, we started a new project, a special collaboration with Frontline on PBS, to break through the noise around one key issue: the fallout from the Supreme Court's decision on Citizens United.

Outside spending enabled by the Supreme Court's decision in Citizens United has accounted for $119 million in spending on the presidential race.

Democratic super PAC pumping money into a race that looks increasingly like a GOP pickup

Americans for Job Security's new ad attacks Obama on economic issues