U.S. President Joe Biden met Tuesday with New Zealand Prime Minister Jacinda Ardern in the Oval Office, telling her he wants to pick her brain on her government's efforts to combat extremism and gun violence, following the mass shootings in Uvalde, Texas and Buffalo, New York. The talks between Biden and Ardern were to center on trade, counterterrorism, security in the Indo-Pacific, but the two leaders starkly different experiences in pushing for gun control loomed large in the background.