Biotech billionaire Vivek Ramaswamy has embarked on a statewide bus tour across Ohio with fellow Republicans. The big red bus declaring “Vote Republican” rolled Friday as Ramaswamy's gubernatorial campaign’s ad featuring the estranged mother of Democratic rival Dr. Amy Acton is sowing growing divisions within his party. Republicans were already in unexpectedly tight races, especially for governor and U.S. Senate, in a state President Donald Trum…