Dow drops nearly 650 as worries build about the economy [Video]

NEW YORK — U.S. stocks tumbled Monday and wiped out even more of their gains since President Donald Trump ’s election in November, after he said that tariffs announced earlier on Canada and Mexico would take effect within hours.

The S&P 500 dropped 1.8% after Trump said there was “no room left” for negotiations that could lower the tariffs set to begin Tuesday for imports from Canada and Mexico. Trump had already delayed the tariffs once before to allow more time for talks.

Trump’s announcement dashed hopes on Wall Street that he would choose a less painful path for global trade, and it followed the latest warning signal on the U.S. economy’s strength. Monday’s loss shaved the S&P 500’s gain since Election Day down to just over 1% from a peak of more than 6%. That rally had been built largely on hopes for policies from Trump that would help …