Concur with TR here.
I currently teach ~1000-1200 CHL students a year (for about 8 years or so) and a little less than 2% (when asked voluntarily to raise their hands for a head count) are teachers.
I end up speaking with almost all of them on this very topic. None of them fit the "liberal" label as far as I could tell. They tended to shoot well (nothing too demanding on the course) and they were serious about gun issues. Most of them expressed concerns about liability in the classroom though....
An interesting statistic from the CHL school where I teach, of the 22,000 + students we've taught, only 5 have been in shootings, only one went to jail (he talked to the police for over 8 hours without the benefit of legal council present as I recall).
One out of 22,000+. We must be doing something right down here in Texas....