The Trump administration has recently sought to scale back sanctions as adversaries develop workarounds that some believe could erode the U.S. dollar's supremacy.
Markwayne Mullin reiterated the president's false claims about voting security while escalating the administration's legally questionable attempts to control state elections.
The White House did not respond to questions about what legal mechanism he would use to impose the tariffs or how the administration would calculate the rate of the levies.
