Since Mike DeWine was defeated in 2006, if I could make a list of the most anti gun senators of the 110th Congress, I would replace his name with that of Barack Obama.
An interesting point to note is that the People's Republics of California, New York, and Massachussetts have both their senators on the list (my list also includes both Illinois senators). Also, five of the ten on the most anti gun representatives list are from the people's Republics of California and New York. Gee, what a shock!