President Donald Trump’s flurry of tariff letters to more two dozen countries has triggered new threats of retaliation. Key US industries are increasingly worried they are going to be collateral damage. The European Union on Monday released a targeted list of $88 billion worth of US goods it plans to tariff if it doesn’t make more progress in trade talks with Trump. Brazil, staring down a 50% duty on its exports to the US over Trump’s frustration with their domestic politics. …While the hardening battle lines in the negotiations could be part of each sides’ effort to force more concessions, domestic business groups aren’t counting on it. Instead, they are mobilizing to try and convince both the Trump administration and foreign governments that it would be a mistake to target their industries. …On Tuesday, the president dismissed the idea that the EU may go through with their proposed retaliatory tariffs.