Two Republicans who triumphed last week in North Carolina special elections became members of the House on Tuesday, including one whose narrow win displayed anew that suburban voters are deserting the GOP while rural residents are embracing the party. The swearing-in of Dan Bishop and Greg Murphy brought the House to full strength, if only briefly because a Wisconsin lawmaker will relinquish his office next week. The oath of office was administered by Speaker Nancy Pelosi, D-Calif., a regular presence in GOP television spots that characterize Democratic candidates as radicals.