Top congressional Democrats officially introduced legislation Thursday to raise the federal minimum wage to $15 an hour by 2024, up from its current level of $7.25. The move marks a stark policy change for the party, which was promoting an increase to just $10.50 as recently as 2015. "What we are here today to say is that a living wage is $15... If you are working 40 or 50 hours a week, you should not be living in poverty," said Sen. Bernie Sanders, I-Vt. He noted it had been almost a decade since the last time Congress had raised the...