Voters in Ohio are heading to the polls today for a special election to decide whether to make it harder to amend the state’s constitution by raising the threshold from a simple majority to 60% of the vote. Republicans in Ohio introduced the ballot measure just months before voters will decide in November whether to enshrine abortion rights in the state’s constitution. The Republican megadonor Richard Uihlein of Illinois, a key backer of anti-abortion groups, has bankrolled the Republican effort by giving $4 million to the group Protect Our Constitution.