The Republican primary process has revealed how unprincipled some of the candidates are. Some appear to be willing to say or do anything to garner votes.
Michelle Bachmann was willing, using junk science, to accuse Rick Perry of causing children to get autism through his birth-control policies. Perry and Newt Gingrich (who promised to run a positive campaign) have undermined capitalism in order to smear Mitt Romney, who allowed a series of exaggerated ads to bring down Gingrich. Ron Paul called Rick Santorum corrupt. (Of course, Paul may actually believe this, as he seems to drift in and out of sanity on a regular basis.)
Santorum, by contrast, appears to be a man of conviction. While this isn’t the only thing I’m looking for in a candidate, it’s pretty important, don’t you think?