WASHINGTON (AP) — The committee that sponsors presidential debates during the general election has chosen Denver, Hempstead, N.Y., and Boca Raton, Fla., as the sites for three debates in October 2012.One vice presidential debate will be held in Danville, Ky.The Commission on Presidential Debates announced Monday that the debates between President Barack Obama and his Republican challenger will take place Oct. 3 at the University of Denver, Oct. 16 at Hofstra University in Hempstead, N.Y., and Oct. 22 at Lynn University in Boca Raton, Fla. The vice presidential debate is set for Oct. 11 at Centre College in Danville, Ky.Washington University in St. Louis will serve as a backup site.The commission was established in 1987 and has sponsored the official presidential and vice presidential debates since 1988.