Sen. Claire McCaskillClaire McCaskillFive takeaways from the Georgia special election Picking 2018 candidates pits McConnell vs. GOP groups Potential McCaskill challenger has .7M: report MORE (D-Mo.) took the unusual step of calling out a single one of her followers on Twitter, who apparently started following her today.

She tweeted Wednesday:
I'm honored that Joe Rospars is following.Thank you for providing the conduit for 13 million strong. Our country is better for your effort.

Rospars served as New Media Director for President Obama's campaign this past fall, and is a founding partner of Blue State Digital.

(For the uninitiated: Some Twitter users have begun referring to their followers and friends as "tweeps," a hybridization of the word "Twitter" and "peeps," a slang term for friends.)