With few limits or controls, Citizen United designed Super-PACs now essential in campaign arsenals | Democracy, elections and voting at Democracy Chronicles

WASHINGTON — In the 2012 presidential campaign, super political action committees were helpful, but not required. Four years later, they are crucial. The organizations, which can collect unlimited amounts of money, formed earlier this time around. They are raising tens of millions of dollars, more money than ever before. And they are bankrolling what used to…