According to Brexit campaigner Nigel Farage, if Prime Minister Theresa May allows Brexit to be watered down or halted by supporters of European Union membership, Britain will be thrust into its gravest constitutional crisis since World War Two. Farage, was the UKIP leader, who convinced Prime Minister Theresa May’s predecessor, David Cameron, to call the Brexit referendum. He then helped lead the campaign to leave the EU. Farage now thinks Brexit is in danger of being scuttled by the establishment.