WASHINGTON — South Bend, Ind., Mayor Pete Buttigieg on Monday unveiled a sweeping plan aimed at lowering prescription drug prices — and though he’s one of the most moderate Democrats in the 2020 presidential race, the plan is anything but.

Buttigieg’s proposal includes a number of drug pricing ideas once seen as radical, including a policy change that would force pharmaceutical manufacturers to forfeit as much as 95% of a drug’s revenue if the company refuses to negotiate prices. “Worst offender” drug companies could also forfeit their patent rights.