Many Americans are understandably concerned about the cost of aid to Ukraine. But they are thinking about the issue the wrong way — we should be considering the cost of Ukraine losing.

Analysis conducted at the American Enterprise Institute has determined that Russia defeating Ukraine would cost American taxpayers an additional $808 billion over what the U.S. has planned to spend on defense in the next five years. This is about seven times more than all the aid appropriated to the Pentagon to help Ukraine since Russia’s 2022 invasion.

This estimate is based on a scenario in which the U.S. stops providing aid and the resulting Russian victory requires us to adapt our military capabilities, capacity and posture in order to maintain our security. The study then uses the Defense Futures Simulator to estimate the spending required to deter and, if necessary, defeat Russia in Europe, while also preventing further conflict by emboldened adversaries in the Pacific and the Middle East.

Without U.S. support,........

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