Donald Trump picked up another win in Michigan’s Republican primary on Tuesday but weathered a further attack from rival Nikki Haley, who told The Wall Street Journal that his candidacy would mean “suicide for out country” in some of her strongest criticism yet of the GOP presidential front-runner.

       “This may be his survival mode to pay his legal fees and get out of some sort of legal peril, but this is like suicide for our country,” she the former UN ambassador of the man she served as president, who now faces four criminal indictments and 91 felony charges.

       “We’ve got to realise that if we don’t have someone who can win a general election, all we are doing is caving to the socialist left.”

       Ms Haley has repeatedly pointed to polling that indicates she could beat Joe Biden in November, whereas the contest between the president and Mr Trump is too close to call.

       On the legal front, Mr Trump this week appealed the $454m verdict in his New York fraud trial and sought to have key witnesses Stormy Daniels and Michael Cohen excluded from his hush money trial, which begins late next month.