The polarisation of US politics is likely to gather pace tomorrow in a host of contests across the country in which Republican and Democratic establishment candidates face being thrown out, victims of a wave of populist hostility towards Washington.
The contests, labelled Super Tuesday 2010, amount to the biggest test of the US public mood since Barack Obama was elected two years ago.
The elections, mainly primaries to choose candidates to stand in the congressional midterm elections in November, are being held in Pennsylvania, Kentucky, Arkansas and Oregon.
"We are seeing a lot of longterm entrenched incumbents up for re-election and people deciding to send them packing," said Brad Coker, head of the DC-based Mason-Dixon polling and research company.
http://www.guardian.co.uk/world/2010/may/17/us-super-tuesday-polarisation-predicted