The Bulgarian government has chose to support the reelection of Donald Tusk as Euripean Council President for another term.
So, too, does the Polish government believe Tusk is using his European Council presidency to interfere in Poland's domestic politics.
The ruling party's powerful leader Jaroslaw Kaczynski said earlier this week that Tusk was "Germany's candidate" for the European Union presidency.
"I don't see how one country could oppose this solution when all the others are in favor", said French President Francois Hollande, echoing comment from numerous bloc's 28 leaders. "The conclusion from Brexit should not be "we need more multi-speed Europe", a European diplomat said on condition of anonymity.
European Council President Donald Tusk arrives for a meeting as part of the EU summit on March 9, 2017 at the new "Europa" building in Brussels.
British MEP Syed Kamall, leader of the European Conservatives and Reformists group in the European Parliament, said "Recent referendum results in the UK, Netherlands, Italy, Hungary and Denmark have shown a loss of faith in the EU".
Jaroslaw Kaczynski, the powerful head of Poland's ruling rightwing Law and Justice (PiS ) party, accused political arch-rival Tusk of having "betrayed his own country". "I will do my best to make the European Union better", Tusk wrote in a tweet.
Maltese prime minister Joseph Muscat chaired the session to decide Mr Tusk's mandate.
Poland's nationalist government, which has often been at odds with Brussels and EU partners, has proposed little-known Polish EU lawmaker Jacek Saryusz-Wolski to replace Tusk.
The newly re-elected Tusk said he was "grateful for the trust the European Council has placed in me, but now is not the time for self-congratulations".
But eastern countries in particular fear this will lead to a virtual apartheid system where they are left behind on issues like the euro currency, the economy and defence while the major powers push ahead.
Luxembourg's Prime Minister Xavier Bettel made clear to journalists that he will support Tusk all the way.
"Unity does not equal uniformity", French President Francois Hollande said after the talks.