Jimmy Carter did not undertake any war abroad but was nevertheless pro-DU weapons during his presidency. This is the direct consequence of his anti-plutonium policy that he established in 1977.

On this regard Jimmy Carter’s pro-uranium-enrichment gestures have to be seen also in the perspective of the storing of DU for future weapons… He visited the K-25 enrichment plant in 1978, following hence the above anti-plutonium policy. From Energy.gov…

In 2005 he wrote a reply to a letter on DU weapons from Bill Compher, stating that “the Iraqi War was unnecessary, unjust” and that “using depleted uranium is just one of a litany of issues that need to be addressed, but the decisive voice will be those of the general public, which seem largely ignorant or supportive of the policies named above”. The letter he replied to mentioned leukemia, birth defects, cancer… killing people with long term effects of inhaled or ingested DU, and radioactivity remaining on areas hit with DU shells. This was in the Eatonville Dispatch on 2d February 2005. So I think he did discover the health effects after his presidency, and regretted his policy later but did not went up to questioning his anti-plutonium policy that was core in the strategy of use of DU weapons in the Cold War in the 1980s, a strategy enacted in Ukraine in 2022. Possibly as a Baptist committed to peace he did not want to see the benefits of plutonium for cleaning up with fast neutrons (by mixing with e.g. sodium…) the DU in the soil, and simply for armour-piercing weapons, instead of HEU. There are other more peaceful ways to clean DU by the way, such as Fermionic condensators for antigravitons, which are already used militarily, this is how the Canjuers camp and the Germanwings DU fallout have been cleaned. A peace corps in Ukraine could henceforth contribute to a complete cleaning of DU from soils and trees, with the principle that those who clean the DU keep it.

He clearly adopted a way of resolving conflicts that involved cremating troublemakers in motors, for propulsion. Especially Soviet spies. See his last name. In these systems plutogenization is limited by the crematory material’s biological content, it doesn’t contravene wholly the antiplutonium policy (there is a 33% maximum Pu ratio usually with standard crematory plutogenization). It also can’t really easily be diverted for weaponsmaking as crematory plutonium can’t be cleansed of its biological matter with any chemical and its nuclear explosions are weaker.