Nigel Farage, then-leader of the Independence Party, speaks in London after the United Kingdom voted to leave the European Union on June 24, 2016. (Adam Ferguson/The New York Times) By STEPHEN CASTLE Nigel Farage, the leader of the populist right-wing Reform UK party, on Tuesday said he would resign his seat in Parliament and run for reelection in his Clacton seat to answer criticism of his financial affairs. The unexpected move comes after recent revelations about gifts and financial support…