From a Wall Street Journal story by Yaroslav Trofimov headlined “Europeans Grow More Assertive on Ukraine as Washington Shows Caution”:

VILNIUS, Lithuania—Last week’s NATO summit revealed a major realignment within the U.S.-led trans-Atlantic alliance.

European nations, once seen as less steadfast in their support for Kyiv and more vulnerable to Russian pressure, are determined to help Ukraine win an unambiguous victory. At the same time, the Biden administration, which orchestrated a unified Western response to Russian President Vladimir Putin’s invasion last year, is increasingly cautious—constrained by domestic politics and a fear of direct confrontation with Moscow.