Get off your knees, President Trump

After crawling over hot sands to kiss the, er, ring of the blundering Saudi crown prince — the most appalling grovel in the history of the U.S. presidency — President Trump must demand something in return. Otherwise, he has traded what remains of the dignity of his office for mere humiliation.

I’m not talking about a deal for Saudi Arabia to buy more U.S. weapons, though Trump flaunts this justification for his simpering weakness in response to the murder of journalist Jamal Khashoggi, a contributor to The Post. According to Trump, the United States must either cower before Mohammed bin Salman or the prince will take his $110 billion elsewhere.

Please. Even if the United States would sell its honor at that paltry price, there is no $110 billion. The number emerged half-baked from Trump’s overheated hype kitchen. Much like the president’s claims about his personal net worth, his creditworthiness and his business acumen, this Saudi largesse resembles reality the way a circus tent resembles a Chanel frock.