Brookings Institution
Brookings states that its scholars "represent diverse points of view" and describes itself as non-partisan. The media describe Brookings as "liberal-centrist" or "centrist". An analysis of Congressional records from 1993 to 2002 found that Brookings was referenced by conservative politicians almost as often as liberal politicians. It got a score of 53 on a 1-100 scale with 100 the most liberal score. The same study found Brookings to be the most frequently cited think tank by the U.S. media and  politicians.