Europe

Celebrate closer EU union? Not with all that division

  • FILE - In this Thursday, Nov. 24, 2016 file photo, European Council President Donald Tusk, left, walks with European Parliament President Martin Schulz, center, and European Commission President Jean-Claude Juncker at the European Council building in Brussels. The 28-nation EU has been rocked by the British exit referendum last year, and acrimonious relations with some eastern members on migration and constitutional law. (AP Photo/Virginia Mayo, File)

    FILE - In this Thursday, Nov. 24, 2016 file photo, European Council President Donald Tusk, left, walks with European Parliament President Martin Schulz, center, and European Commission President Jean-Claude Juncker at the European Council building in Brussels. The 28-nation EU has been rocked by the British exit referendum last year, and acrimonious relations with some eastern members on migration and constitutional law. (AP Photo/Virginia Mayo, File)  (The Associated Press)

  • FILE - In this June 22, 2016 file photo, European Commission President Jean-Claude Juncker wipes his brow before speaking during a media conference at EU headquarters in Brussels. The 28-nation EU has been rocked by the British exit referendum last year, and acrimonious relations with some eastern members on migration and constitutional law. (AP Photo/Virginia Mayo, File)

    FILE - In this June 22, 2016 file photo, European Commission President Jean-Claude Juncker wipes his brow before speaking during a media conference at EU headquarters in Brussels. The 28-nation EU has been rocked by the British exit referendum last year, and acrimonious relations with some eastern members on migration and constitutional law. (AP Photo/Virginia Mayo, File)  (The Associated Press)

  • FILE - In this Tuesday, June 28, 2016 file photo, European Commission President Jean-Claude Juncker, right, walks with British Prime Minister David Cameron prior to a meeting at EU headquarters in Brussels. The 28-nation EU has been rocked by the British exit referendum last year, and acrimonious relations with some eastern members on migration and constitutional law. (AP Photo/Geert Vanden Wijngaert, File)

    FILE - In this Tuesday, June 28, 2016 file photo, European Commission President Jean-Claude Juncker, right, walks with British Prime Minister David Cameron prior to a meeting at EU headquarters in Brussels. The 28-nation EU has been rocked by the British exit referendum last year, and acrimonious relations with some eastern members on migration and constitutional law. (AP Photo/Geert Vanden Wijngaert, File)  (The Associated Press)

The European Union's Commission chief has used the 25th anniversary of the summit to reinforce the goal of an ever-closer union to lambast some member states that refuse to apply common rules and said the bloc needs to rethink a looser relation for those not fully committed to the common cause.

Jean-Claude Juncker acknowledged a quarter century after the Maastricht Treaty on tightly knit unity that Britain and others had changed conditions to the extent that he was considering a system where some, beyond a primary group of nations, would be in "a different orbit" to remain linked up but not necessarily close.

The 28-nation EU has been rocked by the British exit referendum last year, and acrimonious relations with some eastern members on migration and constitutional law.