Another one who hasn’t got a clue how NATO is funded.
The operational costs of NATO are funded proportionally to each members GDP and everyone contributes a fair amount.
What Trump was talking about was individual country’s defence budgets and was deliberately incorrectly conflating it with paying for NATO, then making out that everyone owed the US money. It was bullshit then and it still is. Some NATO members should undoubtedly spend more on their own defence, and they had committed to up their spending to 2% by 2024. I suspect that after this those countries will get their spending up rather quicker than they would have done.