FILE - President Donald Trump speaks during the NATO summit, Dec. 4, 2019, in Watford, England. NATO allies are gathering in Washington for a summit this week, and the prospect that former President Trump, the military alliance's most prominent critic, may return to power is dominating discussions. President Joe Biden's shaky performance in the presidential debate last month escalated doubts about his reelection. It's given rise to the term "Trump-proofing" or "future-proofing" NATO, making the alliance more self-sufficient. (AP Photo/ Evan Vucci, File)
FILE - NATO Secretary General Jens Stoltenberg, right, speaks with President Joe Biden during a NATO summit in Vilnius, Lithuania, July 12, 2023. NATO allies are gathering in Washington for a summit this week, and the prospect that former President Donald Trump, the military alliance's most prominent critic, may return to power is dominating discussions. Biden's shaky performance in the presidential debate last month escalated doubts about his reelection. It's given rise to the term "Trump-proofing" or "future-proofing" NATO, making the alliance more self-sufficient. (AP Photo/Pavel Golovkin, File)