Fallacious arguments: Appeals to Authority.
If Thad Cochran were to publicly announce, bright and early tomorrow morning, that John Edwards was "a loyal, traditional conservative," would that be enough for you... or: would you, instead, insist upon judging the latter on his record? And just what sort of "conservative" is it, precisely, that attempts to violently cram another 30,000,000+ illegal aliens down our collective throats -- America's borders and national security be damned -- anyway? Hmmm?
I’m not anywhere near as anti-immigration as you are, but the border security issue is far less debateable in my mind, something that McCain ought to address next after the economic situation and the usual Democrat demagoguery. As for Cochran, an endorsement of McCain is meaningless.