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Trump signed the Tax Cuts and Jobs Act, cutting the corporate tax rate from 35 to 21 percent and changing individual rates and deductions. It was the largest tax overhaul since 1986.
In a Rose Garden address, Trump announced the United States would withdraw from the Paris climate accord, saying he was elected to represent the citizens of Pittsburgh, not Paris. Formal withdrawal completed in November 2020; the US rejoined in 2021 and withdrew again in 2025.