
Barack Obama campaigns in Ohio, sharply criticizing Donald Trump and Republican tactics.
Obama criticized Trump's policies and personal style during Ohio rally.
The former president mocked GOP candidate Ramaswamy over controversial ad.
Democrats Amy Acton and Sherrod Brown highlighted at the rally.
Ohio is a critical battleground in the midterm elections. Obama's campaign focus includes Michigan and Georgia next.
Obama is scheduled to campaign in Michigan alongside Democratic candidates later this evening.