Retiring President Biden told reporters Thursday that he disapproves of President-elect Donald Trump’s “counterproductive” threat to slap tariffs on Canada and Mexico if they don’t take action to stop the flow of fentanyl and illegal immigration across the US border. “I hope he rethinks it. I think it’s a counterproductive thing to do,” Biden, 82, said while paying a Thanksgiving visit to a fire station on Nantucket, where he’s vacationing at billionaire David Rubenstein’s home. “We’re surrounded by the Pacific Ocean, the Atlantic Ocean and two allies, Mexico and Canada. The last thing we need to do is begin to...