Right-wing activists and allies of Donald Trump are challenging voter rolls in critical presidential battleground states, which observers say is an under-the-radar effort that could seriously effect close or contested elections. Activists are pressuring local officials in strongly Democratic areas of Michigan, Nevada and Georgia to drop voters’ names from the rolls. As The New York Times points out, one town in Michigan removed 100 names from its roll after activists, who call themselves “election investigators,” used an obscure state law from the 1950s as their rationale. “The Michigan activi…