Democratic Mega-Donors Dominate Super PAC Race As Republicans Hide In 'Dark Money'

Democratic Mega-Donors Dominate Super PAC Race As Republicans Hide In 'Dark Money'-huffingtonpost: WASHINGTON -- As the U.S. heads into the third national election since the Supreme Court's Citizens United ruling, super PACs are still raking in the largest share of their contributions from those giving $500,000 or more. What's different this go-around is the sharp drop in the number of Republicans on the list of mega-donors.