 But Biden's reelection prospects loom large over the international gathering. He's due to close the summit with his first press conference since last month's shaky debate performance, which has since led to a wave of calls among allies for Biden to step aside. And Piers Windsor-Johnston has more. Both critics and allies of the president's will be watching closely as Biden takes questions during an unscripted news conference at the end of a three-day NATO summit.