Manufacturers from Asia, Europe and elsewhere have poured billions into North American supply chains that could be hit by new taxes on Mexico, Canada and China.

Tariffs on goods from Mexico and Canada could arrive Saturday. Look for confusion on the border, higher prices and cheers from the steel industry.

Secretary of State Marco Rubio says President Donald Trump’s desire to acquire Greenland and retake control of the Panama Canal is driven by legitimate national security interests stemming from growing concerns about Chinese activity in the Arctic and in Latin America.

The secretary of State said purchasing the Danish territory is important to the country’s national interests in the Arctic.