Fredreka Schouten for USA Today:

Bush is not alone in advancing his presidential bid through a new crop of big-money groups authorized by a pair of federal court rulings, including the Supreme Court’sCitizens United decision in 2010. The ruling permitted unlimited spending by corporations and unions in candidate elections. Other candidates also are getting support from super PACs, and several have long-standing non-profit policy arms.

Bush has stood out because he’s raising large sums quickly, and his allies have pulled together the affiliated organizations in a relatively short time period….

This week, a second pro-Clinton super PAC called Correct the Record announced it would coordinate closely with Clinton’s campaign. Organizers of the group, whose sole mission will be defending Clinton’s record, argue that because they will not fund paid advertising they will not run afoul of rules that bar super PACs from coordinating their spending with candidates.

Richard Hasen, an expert on election law at the University of California-Irvine, called Correct the Record’s move an “aggressive interpretation” of coordination rules.

It’s unlikely that the six-member, gridlocked Federal Election Commission would take any action if a presidential candidate stepped over the line. The commission’s chairwoman, Ann Ravel, declined to comment on any candidate’s practices, but she told USA TODAY this week that “recent history” on coordination issues “portends slim hope that we will be able to reach four votes to penalize any major transgressions.”

Hasen said the new campaign funding practices in 2016 are likely to set the precedent for future contests.

“The Supreme Court got the ball rolling,” he said, “and candidates are pushing the ball down the hill as fast as they can.”