CRS partnered with the Lyndon B. Johnson School of Public Affairs at the University of Texas at Austin to review a total of 47,004 Facebook posts and tweets published on lawmakers' accounts. The report was published last month.
Among CRS' other findings, Republicans had higher Twitter and Facebook adoption levels than Democrats as of Jan. 24, 2012. House GOP members had the highest adoption rates for both social networks relative to their Democratic counterparts in the lower chamber, with 87.3 percent of House GOP members on Twitter and 94.7 signed up for Facebook.
During the same timeframe, 80 percent of House Democrats had joined Twitter and 90 percent had accounts on Facebook.
Senate Republicans were also more likely to have joined Facebook and Twitter than their colleagues on the other side of the aisle. Roughly 83 percent of Senate Republicans had joined Twitter and 80.9 percent were on Facebook as of January 2012. That's a higher adoption rate than the 78 percent of Senate Democrats that joined Twitter and 77 percent on Facebook.
Altogether, roughly 75 percent of House lawmakers had Twitter and Facebook accounts, while 67 percent of senators had signed up for both social media services as of January 2012, the report said.
However, a small percentage of lawmakers — 6.6 percent in the House and 11 percent in the Senate — were not present on either social network.
The report notes that its findings only present a snapshot of social-media use during this time period, and given the evolving nature of the Web, lawmakers' use of these Web tools are subject to change over time.