Which state is not in the Rust Belt?
In the early and mid-20th century, states like Ohio, Michigan and Indiana made up what was called the Steel Belt due to the concentrated presence of industrial manufacturing in the area. Over time, however, increased automation and outsourcing led to a manufacturing decline and a subsequent loss in population and tax base. Meanwhile, other states with more diversified economies, like California, have been more successful at weathering deindustrialization. Sources: MSNBC, Ohio History Connection