Amid concerns about his health and political future, President Joe Biden has taken a strong stand at the NATO summit in Washington, emphasizing unity against Russia’s aggression in Ukraine and reaffirming America’s commitment to the alliance. What Happened: As per an AP report on Tuesday, Biden’s message was aimed at reassuring international allies as well as his own Democratic supporters, who have been expressing concerns about his health and reelection prospects. Biden has been under pressure to demonstrate his readiness for reelection following a shaky debate performance against Donald Trum…