U.S. needs 48,000 tons of rare-earth magnets. It made 300.

A federal ban on Chinese critical minerals takes effect January 1, 2027. The supply it tries to mandate does not yet exist, and the only mechanism that bridges the gap is a waiver.

In 2025, U.S. demand for the most common type of rare-earth magnet, the kind that goes into missiles, electric vehicles, computers, and consumer electronics, ran to roughly 48,000 metric tons. Domestic sources supplied 300 metric tons, according to consultancy Arthur D. Little figures cited by Reuters. U.S. firms are on track to add capacity for 5,000 metric tons by year-end, still well below demand. The rest of the pipeline runs in years: Guardian Metal Resources is working to open a U.S. tungsten mine by 2028, and Lion Rock Resources is developing a tantalum mine in South Dakota with no opening timeline. The U.S. has not produced tungsten since 2015 or tantalum since 1959.

Rare earths are a category of metals with magnetic and conductive properties essential to defense, clean energy, and electronics manufacturing. Tungsten and tantalum are not rare earths, but they sit in the same critical-minerals basket the ban covers, and the U.S. has lost the industrial base for both.

The Jan. 1 prohibition is sweeping. Defense manufacturers and other buyers must stop purchasing rare earths, magnets, tungsten, molybdenum, and tantalum from China, Russia, Iran, or North Korea. The Trump administration has made U.S. mining and processing of those materials a national security priority, steering tens of billions of dollars into nearly 150 minerals companies. On May 10, the President posted on Truth Social: "ALL FEDERAL AGENCIES MUST BUY AMERICAN — NO EXCUSES!" The Monday before the Reuters story ran, he signed an executive order making it harder for defense contractors to obtain the waivers the regime relies on.

That is the structural collision. Washington has routinely granted companies waivers because U.S. supply cannot meet demand. The new executive order tightens that lever specifically against defense buyers, the segment most exposed on Jan. 1. The deadline will arrive on time. The prohibition will not.

The downstream incidence is broader than the Pentagon. The same materials feed automobiles, computers, and consumer electronics, so waiver decisions will land in price lists and product roadmaps that have nothing to do with weapons. Reuters interviewed 16 industry executives, investors, analysts, and policymakers; Chris Berry, a minerals industry analyst and consultant, was the only one named on the record. "It's going to take many more years to get the needed infrastructure in the ground to compete," Berry said.

What to watch over the next five months is the waiver list, not the mines. The pipeline is real, with 5,000 tons of magnet capacity by year-end, a tungsten mine targeted for 2028, and a tantalum project taking shape in South Dakota, but it is sized to the years after the deadline, not the deadline itself. The deadline's job is to force the waivers into the open, where they become the actual industrial-policy lever of 2026 and 2027.