Rishi Sunak has urged Conservative MPs to stick with him amid speculation about a fresh plot to oust him from Downing Street. The Prime Minister is hoping to win over wavering MPs by claiming the “economy is turning a corner”. However, with Labour opening up enormous leads in recent opinion polls, Tory MPs have talked up Commons Leader Penny Mordaunt as his potential successor. No10 was forced to issue the Prime Minister’s plea on Sunday night as Sunak’s position became increasingly precarious. Sunak told his MPs: “There is now a real sense that the economy is turning a corner, with all the ec…