WASHINGTON, D.C.— U.S. Senator Tom Harkin (D-IA), Chairman of the Senate Health, Education, Labor, and Pensions (HELP) Committee, joined Senators Barbara Boxer (D-CA), Dick Durbin (D-IL), Richard Blumenthal (D-CT), and Edward J. Markey (D-MA) today in introducing the Protecting Children from Electronic Cigarette Advertising Act to prohibit...