WASHINGTON (Reuters) – A former U.S. Marine jailed in Russia since 2022 and allegedly tortured and injected with mind-altering drugs, slipped into a stupor in June and may be close to death, according to two hostage advocacy groups and his sister. The White House and the State Department have urged Moscow to release Robert Gilman, 32, so he can receive urgent medical treatment in the U.S., said Eric Lebson, chief strategy officer of Global Reach, an advocacy group representing his family. Gilman is being fed through a tube, he said. A source familiar with the matter told Reuters they had...