WASHINGTON, D.C.— Senator Tom Harkin (D-IA), Chairman of the Senate Health, Education, Labor, and Pensions (HELP) Committee—along with Senators Patty Murray (D-WA), Robert P. Casey, Jr. (D-PA), Bernie Sanders (I-VT), Chris Murphy (D-CT), Tammy Baldwin (D-WI), Elizabeth Warren (D-MA), Mazie Hirono (D-HI), Chris Coons (D-DE), Tim Kaine...