A bipartisan group of 35 former federal judges on Wednesday asked the judge who oversaw President Trump’s remarkable lawsuit against the Internal Revenue Service to reopen the case and conduct an inquiry into whether the hasty deal to resolve it could be challenged as an act of fraud. The move by the former judges was one of an increasing number of legal efforts to attack the validity of the two extraordinary benefits that emerged from the agreement last week: a $1.8 billion fund that could