By exiting the Paris climate agreement, President Donald Trump says he sought to escape an economic straitjacket that would hinder him from making good on his populist campaign promises and pro-growth agenda. Elected in no small part thanks to voters in "rust belt" industrial and mining states, Trump pledged as a candidate to breathe new life into traditional sectors like auto manufacturing, steel and coal mining. US Steel, which was partly formed with Carnegie's assets, is now only the 11th largest employer in Pittsburgh, and Democratic Mayor Bill Peduto responded to the comment by pledging to adhere to the Paris agreement's objectives, in spite of Trump.



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