Just put in his last name and j for his first name, then use the pull down menu to select "starts with". You will get several records, one of which is his. Click on his name. "Party affiliation" is down about halfway. I looked up other people I know in NC (same way -- last name, first initial) and they are listed as "Republican"!
The link worked today, I have used it in the past but yesterday I couldn't get a result, thanks for the link.