Most Democrats did. Dr. Krauthammer is a Democrat.
In 1978, Krauthammer moved to Washington, D.C., to direct planning in psychiatric research under the Carter administration.[1] He began contributing articles about politics to The New Republic and in 1980 served as a speech writer to vice president Walter Mondale.[1] In January 1981, Krauthammer joined The New Republic as both a writer and editor.[1]
http://en.wikipedia.org/wiki/Charles_Krauthammer
In 2006, the Financial Times named Krauthammer the most influential commentator in America,[10] saying "Krauthammer has influenced US foreign policy for more than two decades. He coined and developed 'The Reagan Doctrine' in 1985 and he defined the US role as sole superpower in his essay 'The Unipolar Moment,' published shortly after the fall of the Berlin Wall. Krauthammer's 2004 speech 'Democratic Realism', which was delivered to the American Enterprise Institute when Krauthammer won the Irving Kristol Award, set out a framework for tackling the post-9/11 world, focusing on the promotion of democracy in the Middle East." In 2009, Politico columnist Ben Smith wrote that Krauthammer had "emerged in the Age of Obama as a central conservative voice," a "kind of leader of the opposition...a coherent, sophisticated and implacable critic of the new president." The New York Times columnist David Brooks says that today "he's the most important conservative columnist."[13] Former congressman and MSNBC host Joe Scarborough called Krauthammer "without a doubt the most powerful force in American conservatism. He has [been] for two, three, four years."[14]
Sounds pretty conservative to me .... compared to some, e.g. Peggy Noonan or the aforementioned "Brooksie", the Old Grey Whore's house "Republican".
Of course, Ted Cruz, Sarah Palin, Mark Levin, and David and Rush Limbaugh, he's not.
Intelligent people change over time ... say 30 years.
Stupid tends to be frozen in time.