Long read: why Trump's trade tariffs may mean he faces a rusty road to reelection

Two years ago President Trump introduced tariffs on Chinese steel and aluminum imports, ostensibly to protect US jobs and markets. Mark S. Langevin writes that these tariffs – and China’s retaliation against US soybean exports – may have hit communities in swing states like Pennsylvania, Michigan and Wisconsin the hardest, potentially making his road to reelection rockier this year.