The theme of division in the church and in society has been frequently invoked during the bishops’ deliberations this week.

Cardinal Parolin’s visit comes at a time when internal divisions among U.S. Catholics have become public.

Much of the business appears to be routine, though the bishops as a body have been vocal in recent months about a range of political and social issues, as well as internal church politics, that are sure to come up during the meeting.

Two leading bishops urged Catholics and all people of goodwill to show support of "our brothers and sisters in such dire need."

The cardinal's pastoral letter is among the most high-profile responses from a Catholic leader to continued racial unrest.

The sisters already have spent hours in voter education for the repeat election.