So intense was Trump's intention to withdraw that he persisted even after the 2020 election. According to a report published by Axios in May, Trump signed a memo in November that would have withdrawn all U.S. troops by mid-January (just five days before his term was to end). His top national security team, civilian and military, persuaded him not to issue the order but to leave the withdrawal date at May 1.
Trump has since said none of the current mayhem in Kabul would be happening if he were still president. Researchers will need to ascertain how many exit visas for Afghans had already been arranged before Trump left office, or what sort of procedures he might have had in place for Americans and Afghans wishing to leave. But lacking such evidence, and given Trump's timetable and concessions made to the Taliban, it is easier to imagine the current situation happening that much sooner.
Trump in fact had complained at his June 26 rally in Ohio that the Biden administration was dragging its feet and ought to get out faster.