Mario Draghi, a giant of Europe largely credited with saving the euro, formally presented a broad unity government to Italy¡¯s president Friday, all but assuring that he will become prime minister at a precarious moment when the prospect of a more closely bound European Union hinges on Italy¡¯s success.

Draghi, who is expected to easily surpass the formalities of confidence votes in Parliament next week, will be tasked with guiding Italy through a devastating and unpredictable pandemic.

But he also must secure its future by wisely and efficiently spending a once-in-a-generation relief package financed by debt raised for the first time collectively by all EU countries. If he succeeds, he could set a precedent. If he fails, EU countries are less likely to approve such a package again.