Glancing through, article 19 clause 2 is going to cause some
serious friction between the US and Europe if it makes it into the final version:
No one may be removed, expelled or extradited to a State where there is a serious risk that he or she would be subjected to the death penalty, torture or other inhuman or degrading treatment or punishment.
If passed this would stop extradition of the most dangerous criminals from Europe to the US. I could kill a bunch of people, hop on a plane to France and enjoy complete immunity from prosecution. And the sick thing is, the more people I killed (or alternatively, the more I raped/tortured/dismembered them in the process), the safer from prosecution I'd be, because the less credible would be any claims that I wouldn't get the death penalty if extradited back to the US.
Let's take a more specific example. It's generally assumed that, whatever form it takes, the tribunals which will be set up in Iraq to prosecute former regime leaders for crimes against humanity will include the death penalty as a possible punishment: it's accepted in both Iraqi and American cultures, and this issue is the primary reason why the US has rejected a tribunal set up under the auspices of the UN. Assume for the sake of argument that this European Constitution, as drafted, were already in force. Assume further that the Iraqi tribunals come into being and they include a provision for the death penalty.
Assume further that the report that top leaders in Saddam Hussein's regime have French passports is true. Saddam could hop a plane to Paris (or anywhere in the EU, as a French passport is an EU passport), set up shop with however many hundreds of millions of dollars he managed to smuggle out of the country, and live out his life in peace and tranquility. After all, there would be absolutely no way to guarantee he didn't face "a serious risk" of the death penalty if extradited back to Iraq. OK, he might be liable for prosecution under the ICC...but no, I don't think he would, as his crimes were presumably carried out before the ICC was created. In any case, the jurisdictional nightmares could concievably stretch on until he died of old age.
For the record, I'm against the death penalty, and I wish the US would get rid of it. But it's not going to happen anytime soon, and neither is anyone in the US going to care one whit when a bunch of Europeans try to dictate their version of morality to us. We'd be more likely to send in a commando team into Belgium to kidnap a high-profile terrorist or mass murderer holed up there than to agree not to seek the death penalty as a condition for extradition. I'm serious, by the way.
Of course, it's obvious that this article is a negotiating tactic; by including this as a fundamental Constitutional right, the Europeans can present a
fait accompli to the Americans when negotiating for extradition treaties that will guarantee the extradited freedom from the death penalty. Too bad for them they're not going to get it: all they'll do is piss the US off. Nor is it clear that an extradition treaty with a foreign country would have the standing in American law to prevent the prosecutor from going for the death penalty anyways. Which of course means that even with such a treaty in place, a criminal could still claim a "serious risk" of capital punishment and escape extradition and prosecution altogether.
This is the sort of reason why you don't put implicit criticisms of other countries into your Constitution just to score self-righteous political points.