.........American Bridge is typical of the new reality. It was founded in November 2010, after the Supreme Court's decision in the Citizens United case opened the door to "SuperPACs," political action committees that are able to raise unlimited amounts of anonymous money to craft attack and advocacy ads during campaigns. The fledgling Democratic research organization now has 15 trackers nationwide filming GOP candidates for Congress and the White House and 25 researchers in Washington poring over this footage and pushing it out to the public. "The fastest way to disseminate information is through social media, such as Twitter and Facebook,"...