"Losing the election in November and having to move out of the White House has given him something to focus on, however. He never cared about governing and didn't have much of an ideology to guide him, but he's finally found something he can believe in and a playbook he can follow: his very own Lost Cause. Trump has embraced with gusto the South's strategy after losing the Civil War: Tell your own people that you didn't really lose, and double down on the nobility and honor of what they still believe in. In the case of the Civil War, it was slavery and the inherent superiority of whiteness and inferiority of blackness. The new Lost Cause is of course Trump himself, to whom his followers attach the same kind of gauzy metaphors that came into use after the Civil War: flags (Trump campaign flags, the Confederate flag and the "Don't Tread on Me" banner are in heavy rotation) songs ("I'm Proud to be an American" by Lee Greenwood and — perhaps not so ironically now — "You Can't Always Get What You Want" by the Rolling Stones are played at all his rallies) and symbols (Mar-a-Lago has become a kind of antebellum shrine to the garish excess Trump represents).
And of course, most important of all are the lies. The lies told to support the South's Lost Cause were as outrageous as they were numerous: Slaves were well treated by their kind and understanding masters and were far better off than they would have been had they remained with their savage tribes in Africa. The war wasn't fought over slavery, it was fought for the cause of "states' rights." Gender roles were preserved in revanchist amber: Men were the protectors of Southern white women's "honor" and "purity," and women returned the favor by forming the Daughters of the Confederacy and charging themselves with erecting the monuments to Confederate war heroes and the Confederate dead which became ubiquitous throughout the South." (our emphasis) -- Lucian K.Truscott IV, writing in Salon this morning.
The treasonous Confederate monuments are coming down, slowly, something that Trump objected to. But the sense of white grievance and revenge is strong among his followers, who have swallowed the Big Lie that he keeps telling about a "stolen election" / his lost cause. The Confederate "lost cause" myth survived generation after generation, through the Civil Rights movement, through the election of President Obama -- twice -- and saw its latest fruition in the person of malignant demagogue Donald "Big Lie" Trump.