All jokes aside, I keep my books politically neutral. I do so by design. It doesn't matter if I'm conservative or liberal, roughly half of my fans would be the opposite, and I don't want to lose half of my fans.
As a fiction writer, my job is to entertain my readers--not tell them what to think or who to vote for. The whole idea of reading a novel is to take a break from reality for a little while. Something which, in my opinion, the romance genre does quite nicely, as the focus is on the relationship between two people who've fallen in love. As a footnote, romance includes a number of sub-genres, such as sweet romance, (no sex) erotica, and gay and lesbian, which, depending on the authors, may or may not have political undertones. I happen to write sensual romance. It seems to be one of more popular styles of romance, again with the focus on the relationship between two lovers.
For those who are interested, there is a genre called, "political fiction." Famous novels in the genre would include George Orwell's 1984 and Animal Farm. I read both when I was in high school, and they are indeed interesting books. There's a time and a place for everything, however, my novels aren't the place for a political debate.