Political Behavior – Polls & Votes
Voting Demographics – great data viz of participation & choice by groups
Pollster.com – public opinion on issues and in elections
Political Science Blogs – connecting current events to political science
The Monkey Cage (WaPo) – American & comparative politics, international relations
Mischiefs of Faction – partisanship & parties in American politics
Five Thirty Eight – American politics
The Upshot (NYT) – American politics
VoteView – Congressional politics & ideology
Duck of Minerva – world politics
SCOTUSblog – Supreme Court, live-blogging for major decisions (better than news)
Lawfare – national security law
Public Opinion Data
American National Election Studies – voting, issue opinions, & attitudes (1948-2012)
General Social Survey – social attitudes & behaviors, including some political (1972-2012)
Pew Survey Research Center
Nathan P. Kalmoe 