Nato braces for difficult summit as Trump puts pressure on spending

Meeting of 32 member states comes at crucial time for alliance after tensions with US over Iran and Greenland

Nato leaders will gather in Ankara on Tuesday after a turbulent six months. And as the US continues to pressure its allies to increase defence spending, the other 31 members of the alliance will be hoping to mollify an unpredictable Donald Trump.

On Monday, Mark Rutte, Nato's secretary general, called for the allies to present clear, concrete and credible plans" to reach the organisation's spending targets. President Trump fully expects that all allies will step up immediately and get on the path to 5% and do it with urgency," he said.