Of all things my taxes go to, I would love it the United States Government would buy the patent for this drug and make it freely available to anybody who wants it. The number of things it apparently just cures is staggering.
Novo Nordisk's market cap is $500 B, mostly on the basis of GLP-1 drug profits, and the US' entire discretionary budget is $1,700 B. Even if Denmark would allow the sale, and even if somehow the US did not need to pay a premium to shareholders (typical in acquisitions), that would still be a very substantial expenditure.
The EU loves to ransom US tech companies for budget money. It's very clear that this is an opportunity for the US to similarly damage a big EU company by threatening its patents in the US, or otherwise hitting Novo for tens of billions of dollars in ransom money. The US market is by a huge margin the most important drug market in the world, and especially for Novo.
Find an abusive excuse to invalidate their patents if all else fails. Let Europe learn a valuable lesson in trade wars.