Mike Castle is an American lawyer and politician. He served in the Delaware General Assembly, as Lieutenant Governor of Delaware, two terms as Governor of Delaware, and eight terms as U.S. Representative from Delaware. He is president of the Republican Main Street Partnership and is considered one of the most moderate Republicans in the House.
Castle is a member of various moderate/liberal Republican Organizations, such as Republicans For Environmental Protection, The Republican Majority For Choice, and Republicans For Choice. He is also the co-chair of several Congressional caucuses, including the Diabetes Caucus, the Community College Caucus, the Biomedical Research Caucus and the Passenger Rail Caucus.
Source- Wikipedia http://en.wikipedia.org/wiki/Michael_N._Castle