Congressional Reserve Duty?

A number of disengenous claims that all Americans should serve military duty or that the draft should be reinstated have been made by the Left, most notably by Charlie Rangel. I wonder if such Critters might consider their own duties in that regard. This morning over at CQ I read the following (emphasis mine):

Interestingly, Graham is the only serving member of Congress to serve his reserve duty in Iraq. He works in the JAG Corps as an attorney, and he focused on detainee issues and law enforcement during his two-week stay. As part of that effort, he sat in on a trial of two Iraqi policemen accused of siphoning arms to Shi'ite militias, a trial that took place outside of the Green Zone. A car bomb attack occurred nearby during that time, so Graham has had some experience with the realities of Baghdad.

Graham still remains critical of Nouri al-Maliki's leadership, but argues that he's become almost irrelevant to the reforms. The August recess allowed National Assembly members to go home and face their constituents -- who gave them an earful about their lack of progress on reforms. The changes on the ground have provided momentum for the reforms necessary, and Graham says that all Maliki needs to do is get out of their way.

There are some great quotes by Congressman Graham, so do read the whole article, especially as he counters the verbal judo of Senator Warner which has been all over NPR this week. Is there some kind of reserve duty that Congressmen are actually bound to do? I would guess not, but I would like to know which of our elected officials are in the Reserves and what their respective positions are. A great deal has been made of the military cookies of Senator Warner, who is as old as dirt and has been in the Senate since I graduated from college. But what has he actually seen in Iraq? Hmmm.