Not only in the EU but in all of Europe," Zelenskiy said on his arrival, warning of Russian "disinformation attacks".
"It does worry me," Biden said on Wednesday, though he added that a majority of U.S. lawmakers continued to support funding Ukraine.
In Slovakia, former prime minister Robert Fico's party came first in a parliamentary election on pledges of halting military aid to Ukraine, while Polish Prime Minister Mateusz Morawiecki has said Warsaw was no longer arming Ukraine.
German Chancellor Olaf Scholz said on Wednesday he was "very confident" that U.S. support for Ukraine would continue.
Many EU leaders have condemned the Azerbaijani operation, which triggered an exodus of more than 100,000 ethnic Armenians.
Persons:
Zelenskiy, Spain Zelenskiy, Volodymyr Zelenskiy, Joe Biden, U.N, Emmanuel Macron, Olaf Scholz, Rishi Sunak, Democrat Biden, Biden, Ursula von der Leyen, Robert Fico's, Mateusz Morawiecki, Pedro Sanchez, Ilham Aliyev, Belen Carreno, Andreas Rinke, Anna Pruchnicka, Gareth Jones
Organizations:
Political, EU, British, U.S, Republican, Democrat, European Commission, Kyiv, Polish, European Union, NATO, Spanish, Thomson
Locations:
Spain, Europe, Balkans, Caucasus, Granada, GRANADA, Kyiv, Spanish, Ukraine, Norway, Albania, Russia, Poland, Brussels, U.S, Slovakia, Warsaw, EU, East, Africa, Azerbaijan, Armenia, Serbia, Kosovo, Nagorno, Karabakh, Baku, Berlin