U.S. House Majority Leader Cantor discusses primary election defeat during news conference on Capitol Hill in Washington

On Tuesday Republican primary voters asserted themselves in spectacular fashion by wresting the GOP nomination from House Majority Leader Eric Cantor and giving it to quirky economist Dave Brat, who now looks very likely to win the seat in the fall. This is much more than a run-of-the-mill primary upset. Because Cantor was second in command to Speaker John Boehner among Republicans in the House, his defeat has set off a scramble for power, the outcome of which has yet to be determined.