Jeffrey Donaldson was on Tuesday named the head of Northern Ireland's Democratic Unionist Party -- its third leader in under a month as a Brexit-soaked saga of political backstabbing rolls on. Donaldson, 58, who sits in the UK parliament in London, was the only member to register candidacy in a leadership contest of the hardline pro-UK party, which has been riven by infighting over post-Brexit trading arrangements for Northern Ireland. In a statement, DUP chairman Maurice Morrow said Donaldson "will be the next leader". jts/phz/dl