Tester is often considered a moderate or centrist Democrat. According to GovTrack, he is the Senate's third most moderate Democrat, to the right of most of his Democratic colleagues and even Republican Senator Susan Collins. Tester has generally received high ratings from liberal groups and low scores from conservative groups. In 2012, he was given a 90% rating by Americans for Democratic Action and 86% by the League of Conservation Voters. Conversely, he received scores of 4% from the American Conservative Union and 11% from the conservative National Taxpayers Union. The nonpartisan "National Journal" rated his votes overall as 55% liberal and 45% conservative.