Do billionaires have too much influence in both major parties? Three top Republican presidential prospects — Sens. Rand Paul, Marco Rubio and Ted Cruz — say no.
This midterm cycle, more than half the ads from so-called outside groups are being paid for by secret donors. That means voters will never know who's paying tens of millions of dollars for those ads.
Conservative groups backed by wealthy industrialists David and Charles Koch spent millions but fared badly in the 2012 elections. Now they're assessing how they can get more for their money in 2014 and beyond.