The US joined the USHRC in 2009, reversing Bush policy.
http://www.washingtonpost.com/wp-dyn/content/article/2009/03/31/AR2009033102782.html
Tuesday, March 31, 2009; 5:46 PM
UNITED NATIONS, March 31 — The Obama administration decided Tuesday to seek a seat on the U.N. Human Rights Council, reversing a decision by the Bush administration to shun the United Nations’ premier rights body to protest the influence of repressive states.