Skinner was one of 36 Labour MPs to nominate Jeremy Corbyn as a candidate in the Labour leadership election of 2015. Shortly after Corbyn was elected as leader, Skinner was elected to Labour's National Executive Committee, on which he remained until October 2016. Skinner supported Corbyn, alongside the majority of Labour MPs, in voting against the extension of RAF airstrikes against ISIS in Syria in December 2015. Skinner voted for Britain to leave the European Union in June 2016 and favours outright abolition of the House of Lords.