Prague ? The Irish finally said yes, and the Poles did Saturday, but the EU reform treaty still has a huge hurdle to clear. A “no” from the lone holdout — Czech President Vaclav Klaus — could cripple plans to transform Europe into a global player.

For most European leaders the treaty is a big step toward a European Union that is more effective, more accountable and better prepared to address big issues on the world stage.

Not so for the vehemently Euro-skeptic Klaus, who has been tirelessly attacking the treaty — and now finds himself in the unique position of potentially blocking it.

Klaus is a largely ceremonial head of state — like the Queen of England — and since both houses of Parliament have ratified the treaty, he is all but legally bound to sign the document.

However, speculation runs high that he may try to hold off on his blessing until British elections next year — which the famously Euro-skeptic Conservatives are expected to win easily.