While there is no mathematical formula for calculating partisanship, both party-line voting and ideology were considered in finding the ten most partisan members of Congress.

Politics Online: Nowhere else have the institutional barriers to political participation been lowered than on the internet. From websites, to social networks, to phone applications, today's online technology provides us tools of communication that could not be imagined even a decade ago.

Drop Your Pin to Show Washington Where Partisanship Doesn't Work.