Dr. Amy Acton, a Democrat running unopposed in her party's primary for Ohio governor, faces some steep challenges in the coming general election. She is trying to be the first Democrat in 20 years to win the office in a state that has become dominated by Republicans. Her presumed opponent, Republican Vivek Ramaswamy, has national name recognition and a personal fortune that he is plowing into his campaign. But Acton's most formidable obstacle may be a ghost from her recent past: the COVID-19 pandemic. Acton, a physician, was Ohio's public health director when the coronavirus hit the United States in...