I don't think your political affiliations will be a problem. As stated above, no one is going to outright ask you who you support or how you feel on key issues. But, they may pick up on that bit of info and use it as a way to make conversation...which is fine. The advice to stay away from issues and avoid disagreement is good.
Also, I do not think any of your rec writers will be offended or will "no-rec" you for it. Of course, I am hoping you did not elaborate on political views on your recs, but instead, just listed your activities...Maybe you said "Served as a volunteer for the Obama for President Campaign" Not, " Worked hard for Obama, the savior of this country. Go Democrats!"
