WASHINGTON (AP) — President Joe Biden’s call for authorizing Medicare to negotiate lower prescription drug prices has energized Democrats on a politically popular idea they’ve been pushing for nearly 20 years only to encounter frustration. This year they still lack a clear path to enact legislation. That’s because a small number of Democrats remain uneasy over government price curbs on pharmaceutical companies. House Speaker Nancy Pelosi and Senate Majority Leader Chuck Schumer will need every Democratic vote in a narrowly divided Congress. Otherwise Democrats may have to settle for a compromise that stops short of their goal.