 Trump and some GOP leaders are also trying to court more union voters. And in a sign of that, last night, for the first time ever, the president of the Teamsters addressed the Republican convention. Asma Khalid, NPR News, Milwaukee. The National Security Council had warned the Secret Service and the Trump campaign there was an increased threat to former President Trump coming from Iran. And the Secret Service had boosted protection for Trump in light of that, even before Saturday's assassination attempt.