President Donald Trump has stated numerous times how some NATO allies are not investing enough in their militaries, and it has become the elephant in the room. While President-elect Joe Biden will likely take a calmer stance, the issue is still there as the European pillar of NATO is in a sad state. While the Unites States needs more from European nations, pressing individual countries doesn’t change anything.
Source: https://www.foreignaffairs.com/articles/2021-01-06/eu-military-ally-united-states-needs