Does “making America great again” include living up to the country’s commitments to other nations? Senators should put that question to Secretary of State-designate Rex Tillerson at his confirmation hearing Wednesday – especially with regard to Ukraine, which gave up its nuclear weapons in the 1990s in exchange for assurances that the U.S. has failed to meet.

More than 90 percent of Ukrainians voted for independence in a December 1991 referendum; it was the only former Soviet republic to condition its independence on a vote of its citizens. Independence would have left Ukraine with the world’s third-largest nuclear arsenal, but leaders in Kyiv did not wish to be a nuclear-armed state. The parliamentary declaration of independence, which the voters approved, included a provision that Ukraine would be “nuclear free.” Thus the people of Ukraine voted for a nuclear-free state.

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