EWTN Catholic Q&A
American Cardinal
Question from A. Thompspm on 04-08-2005:

Is this the first time an American cardinal will be participating in the conclave?

Answer by Colin B. Donovan, STL on 04-12-2005:

No, the Church in the United States has had Cardinals going back to John McCloskey in 1875. Altogether there have been over 40 American Cardinals since then.