Missouri Senator Claire McCaskill on why she tweets:

Second, as his bar graph showed, I tweet an average of 4 to 5 times a day. This has become a welcome discipline for me in Washington. As I am walking to a hearing, or riding the tram over for a vote, I think of what I want to tell the folks at home about my work or life. This, I believe, is a fairly decent way to stay connected. After all, I’m in Washington to work for them and this process reminds me of it several times a day. The anti-Twitter backlash is stupid, but at least it has given people who enjoy or find value in Twitter a good reason to write smart things about why it’s stupid.