Political affiliation aside, Americans in general seem most comfortable when they have a First Lady they can respect and a Vice President they can make fun of.
*This theory brought about by memories of my own childhood under Bush 41,
this article, and a conversation James and I had after Jimmy Fallon made the joke "They lit the first candle on the menorah at the White House tonight, then Joe Biden blew it out and made a wish":
James: Is Joe Biden really that stupid?
Me: No, everyone's just so relieved that the Vice President is back to being a genial goof instead of Darth Cheney.