The New York Times says Trump wrote to NATO members, including the leaders of Belgium, Canada and Germany. In his letter to Chancellor Angela Merkel, he warned that what he called Germany's continued under-spending on defence undermines the security of the alliance.
Will NATO members heed Trump's call? And is the North Atlantic alliance still relevant?
Presenter: Elizabeth Puranam | Guests: Peter Galbraith - Former U.S. Ambassador to Croatia & former UN envoy to Afghanistan; Marko Nihkelson - Estonian Member of Parliament & head of the Estonian delegation to the NATO Parliamentary Assembly; Fabrice Pothier - Former Director of Policy Planning at NATO
