Joe Biden delivered remarks at the State Department on U.S. diplomacy and global challenges. He began his remarks by declaring “America is back, America is back. Diplomacy is back, at the center of our foreign policy,” and later speaking about rebuilding alliances that have “atrophied over the past few years of neglect, and I would argue abuse.” The president said he had spoken to President Putin of Russia, saying they have reached an agreement to preserve the START Treaty, and that the days of America “rolling over” to Russia are done, and that the United States “will not hesitate to...