Politics in Writing?

In light of the occasion, I thought I'd discuss politics in writing.

Should we put them in our writing unless it's clearly a political book? Or even at all?
Well, I know I do.
Title Page will hopefully eventually become a controversial look at the practices of the FDA and medical industry.
Across the Stars is more of a look into government corruption. And then, Identity Crisis has a political tone about corporate crime, etc.
In fact, a lot of political messages probably find their way into my stories since I have have such strong, controversial ones (in other words, I thought Ron Paul ROCKED). I should have been a man around 1790 in my views in how government should be. So... It's kind of inevitable, especially since no one's going to discuss them with a hot-headed fifteen year old. Gotta vent somewhere and save my poor family.