Warren expected to launch 2020 bid with populist appeal

LAWRENCE, Mass. — Sen. Elizabeth Warren is expected to formally launch her presidential bid in this working-class city on Saturday with a populist call to fight economic inequality, a message she hopes will distinguish her in a crowded Democratic field and help her move past the controversy surrounding her past claims to Native American heritage.The Massachusetts Democrat will announce her 2020 plans at a mill site where largely immigrant factory workers went on strike nearly 100 years ago