Trump suggests NATO allies spend more on defence
White House press secretary Sarah Huckabee Sanders confirmed Trump raised the idea at a closed-door meeting with fellow NATO leaders Wednesday in Brussels.
It's unclear by what date he'd like to see the increase, AP reported.
Trump has been pressing member countries to spend more on defence, accusing them of freeloading off the US.
NATO estimates that 15 members, or just over half, will meet the benchmark by 2024 based on current trends.