What was Joe Biden thinking when he fist-bumped the Saudi Crown prince?

The mother of all U-turns on dealing with a man he regards as a murderer only makes the US president look frailer

What was Joe Biden thinking? His excruciating fist bump with Mohammed bin Salman, the Saudi crown prince he and much of the world regard as a murderer, marks the low point of a presidency that is slowly dying on its feet.

Maybe America's tottering president thought he was doing it for his country's sake. But many in his country will be dismayed that a man Biden deemed a pariah after the 2018 killing of journalist Jamal Khashoggi is back in from the cold.