Polish bishop’s visit to St. Louis fails to heal rift

A visit from the leader of the world’s Catholic Poles appears to have done
little to patch the rift between two Polish parishes or end a deadlock between
the St. Louis Archdiocese and St. Stanislaus Kostka Church.

On Sunday, Bishop Ryszard Karpinski of Lublin, Poland, dedicated St. Agatha
parish as the new official Catholic Polish church in the St. Louis Archdiocese.
Karpinski is the leader of Polish Catholics outside Poland. St. Louis
Archbishop Raymond Burke and breakaway members of St. Stanislaus Kostka Church
loyal to Burke had invited Karpinski to inaugurate St. Agatha’s as the new
Polish apostolate during a Sunday Mass at the church.

I’d like to know more about the "leader of Polish Catholics outside Poland" part. Anyone?