Answer:
Joe Biden thinks he is going to win the White House in 84 days' time.
That's the unmistakable message he sent just after 4 p.m. Eastern time when, via text, his campaign announced that he had picked Sen. Kamala Harris of California as his vice presidential nominee.
Harris, who ran unsuccessfully for the Democratic presidential nomination earlier this year, had been the front-runner to be Biden's pick for months because, well, she simply made sense.