I looked yesterday and couldn’t find any political contributions in his name (that were large enough to make OpenSecrets). His wife had zero political commentary or groups on her Facebook page.
I don’t know what OpenSecrets uses, but the thing to do is go straight to the FEC database and do an individual search. I do that fairly regularly for names in the news.
I got nothing for a Joseph Stack in TX.
http://fec.gov/finance/disclosure/norindsea.shtml
probably a La Rouche supporter