The U.S. Treasury Secretary Janet Yellen said Russia should be expelled from the Group of 20 (G20) the forum of leading economies that plays a major role in international economic management. She also said U.S. officials may boycott G20 meetings if Russian counterparts show up at upcoming gatherings in Indonesia.

The club has provided global leadership, especially in the wake of the 2008 economic crisis. Because it also includes major developing economies, it has been seen as more representative than the exclusive G7. Yellen’s comments raise questions about the impact of the Ukraine conflict on the G20’s future.