
Disclaimer: the following rant has nothing to do with which candidate I would support.
If I see one more news article that refers to Hillary Clinton as "Mrs. Clinton" while at the same time referring to Obama as "Senator Obama" I am going to scream. Excuse me, but Mrs. Clinton has been Senator Clinton for a long time and has been referred to as "Senator Clinton" pretty much exclusively until this campaign started, at which point she became "Mrs" again. I think she deserves a little more credit than just being called "Bill Clinton's wife."
Also, if you are going to refer to her as "Hillary," you should refer to Obama as "Barack." But talking about "Hillary vs. Obama" has subtle implications. I don't think at this point there would be any confusion if you just called her "Clinton" -- we know that Bill isn't running for president. Referring to someone by their first name while referring to others by their last name is belittling. Take, for example, the one episode of House where Cameron started calling everyone by their first name in order to feel more powerful. Or if you haven't seen it, then imagine going to a hospital and seeing one doctor refer to 9 of the other 10 doctors as "Dr. So-and-So" and then calling the last person "Jenny." Yes, that's the person's name, but using their first name informally in a formal setting is kind of demeaning.