Not all that long ago, many Americans committed hours a day to tracking then-President Donald J. Trump’s every move. And then, sometime after the riot at the Capitol on Jan. 6, 2021, and before his first indictment, they largely stopped.They are having trouble remembering it all again.More than three years of distance from the daily onslaught has faded, changed — and in some cases, warped — Americans’ memories of events that at the time felt searing. Polling suggests voters’ views on Mr. Trump’s policies and his presidency have improved in the rearview mirror. In interviews,…