Hillary Clinton is the Democratic nominee for the presidency, but you wouldn’t know it if you read this on Yahoo! Style:
As a common noun, democratic refers to a democracy or people in general. But if you’re referring to the political party in the U.S., it’s Democratic, with a big D.
Speaking of a big D, that’s the grade I’d give this writer for coming up with Clintons’s. I’d be appalled if I hadn’t seen that error so often on Yahoo!. It seems Yahoo! writers (and their editors, if they have them) don’t know that the plural of Clinton is Clintons and the possessive of Clintons is Clintons‘.