LONDON—The race to succeed British Prime Minister Boris Johnson was whittled down to four candidates Monday, with former Chancellor of the Exchequer Rishi Sunak continuing to lead the extremely unpredictable contest to search out the nation’s new chief.
Mr. Sunak prolonged his lead, getting the backing of 115 Conservative lawmakers, needing simply 5 extra votes to safe a spot within the final-two runoff. Penny Mordaunt, the race’s dark horse, held on to second place with 82 votes and Overseas Secretary Liz Truss closed the hole in third, securing 71 backers. Kemi Badenoch, a former equalities minister, acquired fourth place with 58 votes. Tom Tugendhat, a centrist Conservative, was eradicated.