Admitting that he was "very disappointed" with the alliance, Trump claimed some Nato members refused to support key US military objectives, deepening an already strained relationship with several European leaders. The remarks came ahead of the Nato leaders' summit in Ankara, where Trump met Turkish President Recep Tayyip Erdogan. Speaking to reporters, the US President said the Iran conflict confirmed his long-held doubts about whether Nato allies would back the United States when it needed them most.