Goal: I'm going to compare senators (for one congessional session) to see
how liberal they are, by looking at their votes. Liberal will mean "votes
like Ted Kennedy"

Data: I'll be getting data from the senate webite. A typical XML file is

http://www.senate.gov/legislative/LIS/roll_call_votes/vote1121/vote_112_1_00
153.xml

By changing the "00153" at the end I can get all the votes for this Senate
session.

Plan: I'll count, for each senator, how many times s/he agrees/disagrees
with Ted, and use this to create a ted-ness rating; I'll sort the senators
by Ted-ness and report the results.