REHOBOTH BEACH, Del. — Almost as soon as Donald Trump was officially hit with a new federal indictment, Joe Biden was ready to go nuclear. Before he could catch a 6:30 p.m. showing of "Oppenheimer," the blockbuster summer movie about the development of the first atomic bomb, the president and the first lady settled in for a quick early dinner Tuesday night. As special counsel Jack Smith was addressing the nation, accusing the former president of trying to steal the election from the current president, Biden was seated across from his wife in a booth at a seafood restaurant waiting...