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

Intended to protect domestic industries by raising import prices, they can pressure foreign nations accused of unfair trade practices. However, mainstream economists criticize tariffs as inefficient and harmful to consumers, who often bear the cost through higher prices.

What are tariffs? What tariffs has Trump imposed? Why has Trump imposed tariffs? How will the tariffs work? Who pays the tariffs? How will Trump’s tariffs affect Americans? How will Trump’s tariffs affect the UK?