It is not just a story of conservative Republicans replacing moderates – though that has been the chief driver of America’s polarisation. Democrats are also becoming more liberal. The once powerful centrist Democratic Blue Dog coalition has nosedived from 54 members as recently 2008 to just 15 next year. The term moderate Democrat is becoming almost as rare as its counterpart. Nor is the divergence confined to ideology. The parties also look different. According to Bloomberg, the share of white male Democrats in the 113th Congress is 47 per cent – it fell below half for the first time. Meanwhile, 90 per cent of GOP lawmakers are white male.
That is from Edward Luce.