How did US President Donald Trump impact Europe during his four years in office?

For Ian Bond, director of foreign policy at the Centre for European Reform (CER) think tank, "the biggest impact" of Trump's presidency for Europe, was "the loss of trust in America's reliability as an ally."

"There had been serious transatlantic disagreements in the past — notably over Iraq in 2003 — but no previous president since World War II had challenged the very principle of the transatlantic alliance in the way that Trump did when he questioned whether the US ould feel obliged to defend a NATO ally that was attacked," Bond told Euronews.