The return of Trump will once again put European defense spending levels at the center of the United States’ approach to NATO. Over the past several years, NATO members have boosted investments, with about 20 out of 32 members hitting the alliance’s benchmark of spending 2% of gross domestic product on defense.

NATO boss Mark Rutte said Trump "has been right many times" and played it cool when grilled by members of the European Parliament on the president-elect's Greenland plans.

Germany met NATO's target to spend 2% of its gross domestic product on defence in 2024, the government said on Monday, though well short of incoming U.S. President Donald Trump's call for as much as 5%.