 Wolmar supported Jeremy Corbyn in the 2015 Labour leadership election, saying that he was aiming to avoid a parliament in which Andy Burnham or Yvette Cooper are "basically trying to appease the Tories".In the 2016 Labour leadership election, Wolmar supported Corbyn's challenger Owen Smith.Wolmar was selected as the Labour candidate to contest the Richmond Park constituency in the 2016 by-election and ran on a strongly Remain platform.