Donald Trump is fighting to get time on his side as he urges the Supreme Court to halt his federal election trial while he continues to appeal his immunity case, according to a legal expert who’s watching the case. Every minute that clicks by as he works through appeals over his claim that the office of the president makes him immune from prosecution works in his favor, according to former litigator Lisa Rubin. She pointed to the fact that the longer the court takes to decide, the more delay there is in his federal election interference case — and the closer he gets to a potential election win…