Jules Proctor News Today

marlie hall with more on the investigation. >> for me to govern effectively over the next -- >> reporter: sources tell cbs news the secret service intercepted a possibly ricin- poisoned letter to president obama. we are told the letter had the same markings as letters sent just days ago to new york city mayor michael bloomberg and his gun control organization. the newly discovered letter addressed to the president was not opened but is being investigated. bloomberg kept his public sche...