Even for Donald Trump, it must have been surreal. The reality TV star was there in the biggest reality show of them all, a presidential debate, and reality TV was doing what it promises to deliver — humiliation and embarrassment for the loser. U.S. President Joe Biden was losing — not the debate as much as his dignity — and when it was over, his wife came to escort him off the set, just as “Apprentice” candidates would be ejected from Trump Tower.