1. Has Congress ever had the authority to limit federal court jurisdiction?
Yep – always, with the exclusion of the original jurisdiction of the Supreme Court, a relatively minor constituent of the system. See Article III, Section 2, second paragraph, of the original, unamended Constitution.
2. Is an “affirmation of religion” part of our national heritage? If so, what does that mean exactly and why does it need protecting?
It means that some Congressmen actually believe, and others see it as a political plus to be seen to believe, that the U.S. was founded on the Christian faith (with some token acknowledgement of Judaism thrown in as a courtesy and to avoid looking too sectarian. And in the sense that they mean it, no, it is not. To argue that the FF, men of the Enlightenment, held the particular sectarian views of those who so advocate today, is extremely disingenuous.
3. What are the chances of this bill ever coming to a vote in the Senate?
Probably somewhere between slim and none. It’s one of those election-year look-good measures.
4. Would the Supreme Court strike this law down as unConstitutional? Would the vote be unanimous? How long would it take? Could Congress then pass a law with slightly different wording that does essentially the same thing?
Nope. Whatever you may say about SCOTUS, it’s very much inclined to play by the rules as regards precedent and the sourcing of authority. The Constitution says that Congress can do this; so if they choose to do so, SCOTUS will deny any case, and overturn any case accepted by a lower court, which goes against it.
5. Do you consider this an election year ploy to put strict Constitutionalists and non-fundamentalists in a bad light?
Nope, I see it as an election year ploy to buy the votes of politically uninformed Christians in areas where they constitute a majority or major vote bloc.
6. What is the value of such a bill?
I decline to answer, since this is GD, not the Pit. 