I like him on about everything else.
If RINO literally means "Republican In Name Only", I'd say the claim doesn't really stick.
Strongly opposes women's right to abortion
Opposes preferential minority hiring
Strongly opposes same-sex domestic partnerships
Strongly favors teacher-lead prayer in public schools
Favors the death penalty
Favors three-strikes
etc.
He's got some very strong ratings from the groups that we'd consider to the right. And some poor ratings from the left.
I agree though that he seems to suck on immigration. I'll do more research on Ganley, but imagine I'd vote for either. Portman will certainly have more to answer for on immigration as the race heats up.