Democrats’ ads shift from Trump to abortion and economy with Harris as nominee

Harris is set to accept the party’s nomination next Thursday at the Democratic convention in Chicago, a month and a day since Biden dropped his bid. In the weeks since, the two parties have changed the tone and topics of their ads, seeking to capitalize on issues to energize their bases and win over swing voters in what is expected to be a close Nov. 5 election. Biden forged his 2020 and 2024 campaigns on a message casting Trump as an existential threat to the nation. But since he dropped...