Harris’ closing argument

Vice President Kamala Harris, the Democratic presidential nominee, and her husband Doug Emhoff walk on stage during a campaign event on Tuesday in Washington. (Eric Lee/The New York Times)

Vice President Kamala Harris, the Democratic presidential nominee, speaks during a campaign event on Tuesday in Washington. (Eric Lee/The New York Times)

WASHINGTON — Vice President Kamala Harris used the last major speech of her campaign to unleash a fiery broadside against former President Donald Trump, calling her rival “consumed with grievance and out for unchecked power” and presenting herself as a fighter who would usher in a new generation of leadership.