Former Housing and Urban Development Secretary and Democratic presidential candidate Julian Castro speaks at a Service Employees International Union forum on labor issues, Saturday, April 27, 2019, in Las Vegas. (AP Photo/John Locher) ** FILE **
Democratic presidential candidate Sen. Elizabeth Warren, D-Mass., speaks at a Service Employees International Union forum on labor issues, Saturday, April 27, 2019, in Las Vegas. (AP Photo/John Locher)