U.S.-Based Think Tanks

When considering possible policy recommendations for the upcoming persuasive essay, it might be beneficial to consult those who've thought carefully about the issue at hand.  Here's a list of domestic public policy institutes from Wikipedia.  Here's a list from the University of Michigan that briefly describes the topics and perspectives covered by most of the major think tanks.  Finally, here's a list (slightly outdated) of the 25 most cited think tanks in the media, along with a one word label of their political bias.