Former President Donald Trump indicated he was disappointed with NATO allies regarding defense spending and their involvement in international conflicts, expressing reservations as a summit approached.

Trump reiterated his stance that European allies have not adequately increased their defense budgets, a frequent criticism during his presidency. He also expressed dissatisfaction with NATO's response to specific conflicts, stating his belief that the U.S. was not treated well and did not require assistance in certain operations, such as in Iran.

His attendance at the summit was contingent on its location, with Trump suggesting that the event being held in Turkey, a country led by his ally President Recep Tayyip Erdoğan, was a factor in his decision to participate. He remarked that "it’s possible" he would not have attended if the summit were held elsewhere.

During the summit, NATO allies announced plans to invest over $40 billion in counter-drone capabilities over the next five years, with a goal to significantly increase drone operator training by the end of 2027. NATO Secretary General Mark Rutte described the initiative as being "on the cusp of this transatlantic defense industrial revolution."

Despite these proposed investments, Trump remained critical, stating, "We're going to see. I was very disappointed with NATO."

The comments come in the context of ongoing global security challenges, including recent attacks on Kyiv, which have prompted renewed calls for increased defense support and air defense systems for Ukraine. Ukrainian President Volodymyr Zelenskyy has consistently advocated for Ukraine's membership in NATO and has appealed for more advanced air defense capabilities.