Democrats next year should reclaim congressional tariff-setting authority, wield trade policy to lower costs and repair U.S. relationships abroad as part of their efforts to roll back President Trump’s tariff agenda, the Progressive Policy Institute argues in a new report. The report, titled “ The End of an Error: The Future of Trade Policy After the Midterms ,” was written by Ed Gresser, a former assistant U.S. Trade Representative who is vice president and director for trade and global markets.