Labour Party leadership candidates (R-L) Liz Kendall, Jeremy Corbyn, Yvette Cooper and Andy Burnham participate in a leadership debate hosted by The Guardian newspaper in central London, Britain August 27, 2015. Britain's opposition Labour Party is voting for a new leader in a contest that polls indicate will be won by Jeremy Corbyn, a veteran fan of Karl Marx who has upstaged rivals by promising a radical shift back to the party's socialist roots. REUTERS/Peter Nicholls