Clifton Maloney, the 71-year-old husband of Rep. Carolyn Maloney (D-N.Y.), died in his sleep Friday after successfully climbing the world’s sixth-highest mountain, according to Sunday’s New York Daily News.“It’s just so terrible,— the Congresswoman told the newspaper.Clifton Maloney, a wealthy investment banker, was an avid and experienced mountain climber. He and a guide reached the 27,000-foot summit of Tibet’s Cho Oyu, the world’s sixth-highest peak, on Thursday. According to the newspaper, Maloney’s last words before he went to sleep at the 23,000-foot base camp were, “I’m the happiest man in the world. I’ve just summited a beautiful mountain.—Clifton Maloney served as his wife’s campaign treasurer and was a close political confidante. The couple has two daughters, ages 28 and 21.For now, the newspaper reported, the family’s biggest concern is retrieving Clifton Maloney’s body. He died in China, which does not allow foreign helicopters into its air space. The newspaper quoted advisers to Maloney as saying that Secretary of State Hillary Rodham Clinton has offered to intervene with the Chinese government.