WASHINGTON - President Biden acknowledged on Thursday evening that he and many other vaccinated Americans were “frustrated” with the 80 million Americans who have declined immunization against the coronavirus. The needless ravages caused by the Delta variant, he said, were “frustrating” to watch, repeating a word that seemed to signal the evening’s theme. And he blamed governors playing “pandemic politics” by resisting mask mandates and downplaying the power of vaccines for prolonging the pandemic. “We’ve been patient, but our patience is wearing thin,” Biden said in a speech from the White House, making clear that he blamed the unvaccinated for...