The Senate confirmed President Joe Biden’s choice to lead U.S. diplomacy at the United Nations on Tuesday. The vote for Linda Thomas-Greenfield reflected a divide between the Biden administration’s determination to re-engage with the world body and former President Donald Trump’s diplomacy that often left the U.S. isolated internationally.Senators voted 78-20 to confirm Thomas-Greenfield to the post, which will be a Cabinet-level position.Thomas-Greenfield, a retired