McCain has one son serving in Iraq and another may be on the way. I follow this stuff pretty closely and while I'm sure McCain has made some reference to his sons on the trail, I can't recall it, and it's certainly not something that comes up often. Neither have I heard about McCain's sons from any of his surrogates. Which is what makes this comment from TPM reporter Eric Kleefeld so creepy:

Democrats are facing what could prove a major difficulty in the general election: During the fall campaign, John McCain might have not one, but two sons serving in Iraq. For the Democrats, that possibility could make it much more difficult to hit McCain on Iraq policy. And while McCain himself has avoided mentioning it in his speeches, at least for now, you can bet his surrogates will be more than happy to bring it up every time the Dems hit him on the war.

So McCain's boys are going to Iraq and liberals want to know how this affects their prospects in the general election. As always, I'm overwhelmed by their support and concern for the troops. Clinton and Obama do nothing but hit McCain on the war and his sons have never been mentioned in response, by McCain or anyone else. You know who did politicize his son's service in Iraq? Jim Webb. And TPM loved it.