The Catholic Bishops Conference expresses support for Bishop D’Arcy in the controversy over Notre Dame’s invitation to President Obama

They express their "solidarity" without mentioning what, exactly, the controversy was about. Very politic of them.

USCCB – (Office of Media Relations) U.S. Bishops Express Support for Bishop D’arcy and His Pastoral Concern for the University of Notre Dame

The bishops of the United States express our appreciation and support for our brother bishop, the Most Reverend John D'Arcy. We affirm his pastoral concern for Notre Dame University, his solicitude for its Catholic identity, and his loving care for all those the Lord has given him to sanctify, to teach and to shepherd.