The rapid-fire shots of tariffs and import curbs hearken back to Trump’s first term in office, when the U.S. and China engaged in a trade war that spanned most of Trump’s first four years in office and was continued to a certain extent under his successor, Joe Biden.

China hits back with export controls, Canada and Mexico remain under threat. USPS closes then reopens "de minimis" small package loophole

Here's a quick recap of what has occurred in US politics today: Trump issued a 25% steel and aluminum tariff on all countries, raising fears of a potential trade war and increased consumer costs. The president pardoned former Illinois governor Rod Blagojevich years after the Democrat was found guilty of political corruption charges