As Twitter has risen, so too has political tweeting.

The Atlantic's Will DiNovi and Chris Van Buren have compiled a guide to the 30 top political insiders on Twitter, what they care about, and what they say. From Deputy Iraqi Prime Minister Barham Salih to Karl Rove to Joint Chiefs Chairman Mike Mullen, the list includes 17 journalists, four current elected officials, two former elected officials, three strategists, plus, Mullen, Markos Moulitsas, and Meghan McCain.

Twitter's political influence has taken off since last August, when House Republicans used it to promote their protests on the House floor against Democrats' policy against new offshore oil drilling. Recently, Newt Gingrich made news on Twitter by calling Sonia Sotomayor a racist; and now, it's under a spotlight for the role it's playing in the upheaval in Iran.

Read the list to see Twitter's top political users and their tweeting specialties.