WASHINGTON (AP) — President-elect Donald Trump is threatening tariffs on Mexico and Canada as he seeks to portray them as responsible for illegal immigration and drug smuggling. Over its tenure, the Biden administration has struggled with growing numbers of migrants arriving at the southern border. But this year, the number of people crossing the border without documents has actually been falling. That’s due in part to stricter enforcement by Mexican authorities as well as asylum restrictions announced earlier this year by the Biden administration. When it comes to fentanyl smuggling, much of the deadly supply comes from Mexico though statistics show more than 86% of those sentenced for fentanyl trafficking crimes in the 12 months ending September 2023 were U.S. citizens.