Pro-Russian populist Robert Fico’s strong showing in Slovakia’s election could lead to another fracture in the Western-led coalition to counter Vladimir Putin’s imperialism.

Already, cracks have been emerging in the erstwhile close alliance between Ukraine and Poland in the run-up to the Polish elections on Oct. 15. With Hungary ruled by Viktor Orban, a reliable Putin ally, U.S. President Joe Biden may soon need to contend not only with Donald Trump’s camp of pro-Russian Republicans, but also with the governments of three of Ukraine’s four NATO neighbors going rogue in favor of the Kremlin.

Authoritarian populists make for unreliable allies. But instead of turning a blind eye to populist shenanigans, as the Biden administration has been doing with Poland, or risking important relationships by assuming an uncompromising stance, the U.S. should spearhead efforts to help mend flawed democracies in allied countries through processes of national reconciliation and creative power sharing.