And, incidentally, we also say "Is the Pope Catholic?" and/or "Do bears shit in the woods?", but these are in response to questions with a very obvious "Yes" answer, not statements or predictions:

JOHN: "Do you think that Supreme Court Justice Scalia will vote against same-sex marriage?"
MIKE: "Do bears shit in the woods?"

JOHN: "I expect that Justice Scalia will vote against same-sex marriage."
MIKE: "Duh!"