Here's why:
Linda Lingle, governor of Hawaii from 2002-December 2010 was a Republican.
Neil Abercrombie became governor of Hawaii in December 2010. Less than six months later, Hawaii especially released the birth certificat upon request.
The usual Republican chicanery. That's all.
Linda Lingle (born Linda Cutter; June 4, 1953) was the seventeenth Governor of Hawaii. Lingle holds a number of distinctions: first Republican elected governor of Hawaii since the departure of William F. Quinn in 1962, first county mayor elected governor of Hawaii, first female governor of Hawaii, first Jewish governor of Hawaii; the first governor of Hawaii not to have any children; she has been married and divorced twice. During the 2004 Republican National Convention in New York City, Lingle served as chairman of the convention during the absence of permanent chairman Dennis Hastert from the convention floor.
Prior to her gubernatorial administration, Lingle served as Maui County mayor, councilmember, and chaired the Hawaii Republican Party.
http://en.wikipedia.org/wiki/Linda_LingleNeil Abercrombie (born June 26, 1938) is the 18th and current Governor of Hawaii. He was the Democratic U.S. Representative of the First Congressional District of Hawaii which comprises urban Honolulu. He served in Congress from 1991 to 2010 when he resigned to successfully run for governor. He was also a state legislator and member of the Honolulu City Council.
http://en.wikipedia.org/wiki/Neil_Abercrombie