The president's policies are driving up prices for fertilizer, fuel and machinery. Meanwhile, a campaign to deliver emergency farm aid has stalled on Capitol Hill.
President Donald Trump offered no additional details about the levies, but he said they would take effect Jan. 1 -- leaving time for the two sides to resume negotiations.
Claiming the U.S. is entering an "endgame" in its war with Iran, the treasury secretary is set to release details of what he called the "single greatest financial offensive" against an adversary.