President Donald Trump, wielding a poster-sized chart in the White House Rose Garden today, announced 10% tariffs on imports from most of the world's countries and additional tariffs against countries he described as acting against American interests. A longer list was posted to White House social media during Trump's speech.

The president declared a 10 percent baseline tax on imports from all countries and higher tariff rates on dozens of nations that run trade surpluses with the US.

World leaders were still processing Trump’s complex new tariff regime Thursday and few were prepared to unveil specific trade retaliation. But a number of them promised it was coming, raising the specter of an escalating tit-for-tat trade war that could devastate the global economy.