She received hundreds of thousands of dollars in campaign contributions from doctors, hospitals, drug companies, and insurance companies for her 2006 re-election in the Senate, including several insurance companies that were members of the Health Insurance Association of America that helped defeat the Clinton Health Plan in 1994. Charles N. Kahn III, a Republican who was executive vice president of the Health Insurance Association in 1993 and 1994, refers to his previous battles with Clinton as "ancient history", and says "she is extremely knowledgeable about health care and has become a Congressional leader on the issue."