"A comparison might be useful. Over her time in the Senate, Hillary Clinton has voted with Republicans on any number of occasions. On several key issues, she is more centrist than most of her party—she supports the death penalty, she was a longtime advocate of NAFTA, and she is more hawkish on foreign affairs than most Democrats. Furthermore, if reporters wanted to, they could find plenty of officials from Washington-based progressive groups who would offer critical quotes of her position on a given issue as insufficiently loyal to progressive principles. Yet if a reporter referred to Hillary Clinton as a "maverick," his colleagues would laugh him out of town."
Paul Waldman on the maverick myth.