US President Donald Trump expects all Nato allies attending next week's summit in Ankara to be on a path toward spending 5 per cent of Gross Domestic Product (GDP) on defence and related measures, US ambassador to Nato Matthew Whitaker said on Wednesday.

The NATO countries agreed last year with Washington’s suggestion to increase defense spending to 5% of GDP by 2035

US President Donald Trump expects all Nato allies attending next week's summit in Ankara to be on a path toward spending 5 per cent of Gross Domestic Product (GDP) on defence and…