The two candidates were once friends, with one crediting the other for bringing him into Republican Party leadership. But the competition for the Republican nomination for a Congressional seat on Staten Island has produced a level of rancor that has left the two candidates bitterly sparring and the party in disarray. In the last week, Dr. Jamshad I. Wyne, the finance chairman of the Republican Party on Staten Island and a candidate for Congress, accused his rival in the primary, former Assemblyman Robert A. Straniere, of trying to persuade him to make illegal contributions to Mr. Straniere’s failed 2001 campaign...