"You can now check out the 2008 presidential candidates profiles on Digg! Add your favorite candidates as a friend to show support, and to see all their Digging activity in your friends' activity feed. Many of them will be Digging, commenting and even submitting content.
On the Digg the Candidate's main page you will see a star next to each article by each candidate's name, this article is the candidate's most recent favorite. When you add a candidate as a friend, a box will also be created on your profile showing which candidates you have added." Digg
Some other nice features are:
-You can see how many profile views they have
-You can add the candidates to your friends list
-See what news stories they are promoting.
-Best of all you can get the satisfaction of clicking that button to digg your vote.