Challenges Nixon’s right to withhold evidence — May 21, 1974WASHINGTON — Special Watergate Prosecutor Leon Jaworski has formally complained to Congress that President Nixon is trying to dictate to him “when to prosecute, whom to prosecute and with what evidence to prosecute.”Pursuing the same issue over which his predecessor, Archibald Cox, was fired, Jaworski wrote the Senate Judiciary Committee that Nixon has tried to deny him the right to sue the President to obtain information.Sen. James O …