In the recent US primary elections, the trend has been for establishment republicans to beat Tea Party radicals. Or that was the trend, until the recent defeat of congressman Eric Cantor (R-VA) at the hands of relative unknown Dave Brat. A sitting US majority leader has never before lost a primary election. This puts these two narratives into conflict–is the Tea Party on its last legs, or is it roaring back into prominence? Let’s take a look.