I guess partisan politics overrides self-interest for her!
Mary Cheney, the daughter of former Vice President Dick Cheney and onetime gay outreach director for Coors Brewing Company, gave $1,000 to a Republican Senate hopeful who voted against same-sex marriage and allowing gay couples to adopt children in the District of Columbia.
read the Raw Story: http://rawstory.com/08/news/2009/08/31/mary-cheney-gave-1000-to-anti-gay-senate-hopeful/