In the campaign for president, this was the week when back-to-back natural disasters became an inescapable part of the race, when Vice-President Kamala Harris chose to meet the press and when Donald J. Trump faced new accusations of cozying up to Russia’s president. The Times journalists Michael Barbaro, Astead W. Herndon, Maggie Haberman and Nate Cohn try to make sense of it all.