| Four years ago Donald Trump ran away with Lake County, Ohio, capturing it by more than 15 points. The president’s re-election chances could hinge on his ability to replicate that feat in places like this in 2020. Big margins in Lake and similar blue-collar suburban counties in the Great Lakes region helped Mr. Trump flip several states and win the Electoral College. But polling data in similar counties and interviews here show he has lost some support in places that were central to his 2016 victory. | 