The primary election Tuesday in Ohio set up what is expected to be one of the most expensive races for U.S. Senate this year as Republicans try to hold on to the chamber, while biotech billionaire Vivek Ramaswamy will face a challenge from the state’s former health director as he seeks to keep the governor’s office in GOP hands. In what promises to be one of November’s most high-profile races, former Sen. Sherrod Brown easily defeated a challeng…