Vance worked with Warren on cutting bank executive compensation in 2023 under the aegis of promoting the interest of the American working class. He opposed a corporate tax cut as recently as July of this year. But the Trump campaign's tax policy includes reducing the corporate tax rate to 15%.

JD Vance’s performance on the trail and in the news media reveals both the opportunities and the limits of putting the future of the G.O.P. in his hands.Credit...Doug Mills/The New York Times Supported by By Michael C.