WINDHAM, Maine—Senate candidate Graham Platner (D.) urged his supporters to publicly harass members of Maine’s congressional delegation who oppose Medicare for All. “In the future, when we’re trying to vote on something like Medicare for All, if there are other members of the Maine delegation that don’t want to come along, we need to be able to impose costs,” he said during a Saturday town hall in the southern Maine town of Windham. “We need to be able to turn people out to flood their offices. Frankly, I want people to follow them around and don’t let them have a...