If you look at the donations made by the military personnel overseas, there seems to be a trend:

According to an analysis of campaign contributions by the nonpartisan Center for Responsive Politics, Democrat Barack Obama has received nearly six times as much money from troops deployed overseas at the time of their contributions than has Republican John McCain, and the fiercely anti-war Ron Paul, though he suspended his campaign for the Republican nomination months ago, has received more than four times McCain's haul.

So...Six times more and four times more than the man who would have us in Iraq for one hundred years.

Maybe they think it's time to come home.