After months of delays, President Donald Trump's contentious tariff barrage is now in effect. It imposes a wide variety of new import duties that are the steepest seen in nearly a century and that affect all of the country's trade partners.

Of all the threats the Trump administration has made against California, Gov. Gavin Newsom said the most significant one is here. "We take the most pressing issue, which is the issue of tariffs and retaliatory tariffs that are inevitable and a trade war that's inevitable,