How hard have trade agreements hit Motor City?

Donald Trump unveiled details of his economic policy plan Monday in a speech in Detroit. Some of the details of Trump’s plan are typical Republican fare – an across-the-board tax cut, reforming the tax code, and repealing and replacing Obamacare. But there were also some departures from the Republican play book. Trump proposed making child care costs tax deductible and attacked trade deals like NAFTA and the proposed Trans Pacific Partnership. Michigan has become an important focus for both campaigns, which are wooing so-called blue collar voters hit hard by manufacturing job losses. Hillary Clinton is expected to lay out her economic plan in Detroit later this week. But just how hard have trade agreements hit Motor City?