Amid concerns about President Joe Biden’s mental fitness, he held a rare press conference at the NATO summit. The conference followed a notable gaffe where Biden mistakenly referred to Ukrainian President Volodymyr Zelenskyy as Russian President Vladimir Putin. Critics, including some from his own party, have increasingly cited signs of Biden’s decline. The press conference did little to ease these concerns. Biden stumbled during the first question from Reuters, confusing Vice President Kamala Harris with former President Donald Trump. “Look, I wouldn’t have picked Vice President Trump to be v…