The battle of Kentucky

Politico.com breaks down the key factors that will shape today's primary in Kentucky. Will John Edwards' endorsement swing working-class white voters towards Barack Obama? Or will racism once again rear its ugly head?

Obama is likely to win in more liberal-minded Oregon, buttressing his unassailable mathematic march to the Democratic nomination. Hillary Clinton is hoping for a lop-sided victory in Kentucky - a week after her 41 point triumph in West Virginia - that would further strengthen the case against Obama's "electability". But even if Obama were to fall staggeringly short once more in an Appalachian state, it is hardly a guarantee that Clinton - much maligned amongst Republican voters - would fare any better when facing McCain in November.