Jeremy Corbyn, candidate for the leadership of the Labour Party, center, stands with members of trade unions at an event outlining his plans for a publicly owned railway network, in London, on Tuesday, Aug. 18, 2015. Corbyn is up against Andy Burnham, Yvette Cooper and Liz Kendall for the leadership, with the result due to be announced on Sept. 12. Photographer: Chris Ratcliffe/Bloomberg via Getty Images