Voters are now more likely to credit Vice President Kamala Harris than Donald J. Trump with representing change and caring about people like them, as Ms. Harris takes a slim lead nationally in the race for the White House, according to the latest New York Times/Siena College poll. The finding is the first time Ms. Harris has led Mr. Trump in the Times/Siena poll since July, when President Biden dropped out of the race and Democrats rallied behind Ms. Harris as his replacement. It comes...