Former President Donald Trump is still favored to win the White House, but he doesn't seem to appreciate that Vice President Kamala Harris is gaining ground.Spencer Platt/Getty ImagesDonald Trump has shown he's the same man who cost himself the presidency.Republicans had a playbook to defeat Vice President Kamala Harris.But instead, the former president wants to harken back to the ugliest moments in US history and his own.Don't call it a comeback.