Trump imposed a 50% tariff on imports of washing machines in 2018. Researchers estimate the value of washing machines jumped by around 12% as a direct consequence, equivalent to $86 per unit, and that US consumers paid around $1.5bn extra a year in total for these products.

A trade war uses economic means to lodge a protest against a country or at times protect your country's domestic goods from foreign competition.

President Donald Trump has finally made good on a campaign promise to raise tariffs on Chinese imports – announcing on Saturday duties of 10% on all Chinese goods coming in the country as part of sweeping trade measures that also targeted Mexico and Canada.