Harris did not turn the page and did go back to smearing Trump. A tactit that did not work for any Trump opponent.
Something changed after the FoxNews interview. Harris or campaign felt they needed to go on defense because they cannot defend Biden's empty legacy, lackluster record, and bad policies.
Plus, when Dems have White House, Senate, and House, it's not the President running the country - it's Nancy Pelosi running the show.