As Russian soldiers, tanks, fighter jets, armored vehicles, and artillery units continue to amass along Ukraine’s border, Kyiv is desperately seeking U.S. support. The pro-Western democracy is already straining under the burden of Russian invasions that created enclaves in Crimea and in its southeastern provinces. But now, it must fear a further Russian invasion that may come before Christmas.

Ukraine wants more anti-tank weapons and pledges of specific U.S. sanctions that will follow any new Russian invasion. To prevent this, President Joe Biden must make clear that the Nord Stream 2 pipeline will never pump a cubic foot of gas if there is an invasion. Russian President Vladimir Putin’s top oligarchs must understand that they will also lose access to the United States and its financial system and that the Russian banking sector will be denied access to international markets.