A recent Congressional Research Service study found that 60% of congressional Twitter users are Republicans. Republicans are also more prolific tweeters, sending out many more tweets per day than their Democratic counterparts.

OhMyGov's own Amelia Hassani has been covering this issue as part of the Congressional Twitter Project. She previously reported on the Republican domination of Twitter and is continuing to follow the tweeters in Congress for us.

Twitter use in Congress should grow and intensify this year as the 2010 midterm elections approach. Tha latest installment in the Congressional Twitter Project shows how some candidates are already taking shots at their opponents in 140 characters or less.