Commenting on the tariff increase in his Twitter blog, Mr Trump explained what the consequences of this measure will be:
The US president added that the latest tariffs are "about stopping drugs as well as illegals."
The US leader said that to address the emergency at the southern border he invoked the authorities granted in the International Emergency Economic Powers Act.
After the number of migrants from Central America arriving in the US rose dramatically in the beginning of this year, Mr Trump declared a national emergency in February to secure funds to build a wall on the southern border.