WASHINGTON — Mikhail Lesin, a former aide to Russian President Vladimir Putin who helped found the English-language news service Russia Today, has been found dead in an upscale Washington hotel room. The Russian Embassy in Washington on Friday confirmed the death of Lesin, whose body was discovered Thursday. Russia Today reported on its website that Lesin, 57, died of a heart attack. Metropolitan Police Department spokesman Officer Sean Hickman said that officers were called to the Dupont Circle Hotel about 11:30 a.m. Thursday and found a man dead. Russian Embassy spokesman Yury Melnik confirmed that the man was Lesin. Russia...