President Donald Trump promised during his campaign to end the Russia-Ukraine war in 24 hours if he got elected. Limited progress has been made in that quest as he approaches the 100-day mark of his tenure, and his administration is threatening to walk away from its mediating role.

His administration’s strategy, at least at the beginning of his term, was to reopen communication lines with Moscow, to stop villainizing them, and to push for significant Ukrainian concessions in the hopes that it could get Russia, the side in a more favorable position on the battlefield, to the negotiating table. But that hasn’t stopped the war.