 In April 2018, Open Europe held an event with the Conservative MP Jacob Rees-Mogg on Brexit, the EU, and Conservative Party politics.At the event, Rees-Mogg described Prime Minister Theresa May's plan for a "customs partnership" with the EU as "cretinous".He argued that any post-Brexit immigration system that gave preference to EU migrants was "racist", and also criticised the House of Lords for rejecting parts of the EU Withdrawal Bill, saying