Just because your congress critter claims to represent all that is good, wholesome, moral and right does not make it so. Quite often your Second Amendment rights come in last dead behind political correctness, horse trading and the desires of monied lobbys.
Sonia Sotomayor was confirmed by a vote of 68-31. 25 percent of opposition party members voted to confirm the nomination of Sotomayor. That number included Lindsay Graham.
Those opposition members voting to confirm Sotomayor:
L. Alexander, C. Bond, S. Collins, L. Graham, J. Gregg, M. Martinez, R. Lugar, O. Snowe, and G. Voinovich.