NEW YORK | Xinhua |  U.S. President Donald Trump said Saturday he will raise the new global tariff to 15 percent, one day after he announced a 10 percent worldwide duty following a heavy blow from the Supreme Court. On Friday, Trump announced a blanket 10 percent import tax for all foreign trading partners after …

In a post on Truth Social, Trump said the increase would take effect immediately and argued that many countries had been ripping off the United States for decades.

The US Supreme Court's ruling invalidated a number of tariffs that the Trump administration had imposed on Asian export powerhouses from China and South Korea to Japan and Taiwan.

A long list of uncertainties remains - including what new tariffs Trump will seek to impose, the possibility of refunds and whether countries that entered bilateral deals with the US will see those pacts reopened for review.

It is unclear what happens to the deals made with trading partners now that President Donald Trump’s tariffs have been found illegal by the US Supreme Court, says Hinrich Foundation’s Deborah Elms.

Trump pulled his endorsement of Rep. Jeff Hurd after the Colorado Republican cited Congress’ constitutional authority over trade policy amid a tariff dispute.