What If America Abandons Ukraine?

President Donald Trump is fond of flexibility. Unperturbed by changing course, he prefers not to be pinned down by past precedent or by his own promises. Although he has pledged to end the war in Ukraine quickly, and although Washington has just signed a deal with Kyiv granting the United States a share of future revenues from Ukraine’s minerals reserves, Trump could decide to walk away from the country entirely if he does not get the peace settlement he craves. A final text of the minerals deal has not yet been made public, but there is no indication that it includes security guarantees for Ukraine. As commander in chief, Trump can minimize U.S. support for Ukraine abruptly and dramatically.