WASHINGTON — President Biden looks supercharged. On social media, his eyes glow Terminator-like in images depicting him as an all-powerful figure imposing his will on the nation. Known as “Dark Brandon,” the memes began as an ironic portrayal employing a nickname from the offensive, anti-Biden chant of “Let’s Go Brandon” embraced by former president Trump’s supporters. But after a slew of recent legislative wins, Democrats have appropriated the imagery to celebrate a president suddenly rejuvenated heading toward the fall midterm elections after a nearly yearlong stretch in which he seemed more impotent than almighty... “Over the last few months, it...