The Supreme Court.

[sexobon]

Looks to me like Gorsuch was in an awkward position and Trump was trying to get him to correct it. Gorsuch was standing about 90 degrees to the President and reaching across his own body to shake hands as though he's getting ready to sucker punch the President with his leading arm. Who does that? It's not up to the President to come to him. Gorsuch should have took the hint when Trump first gave him a gentle tug by taking a step towards the President's side to close the distance and then squarely face the President to shake hands. When he didn't, Trump probably went on the defensive thinking the guy was being standoffish; or, manipulative and Trump gave him something to remember that mistake by.

I think Gorsuch probably just got bit overwhelmed and protocol escaped him for a moment. Trump could have been more understanding and motioned for Gorsuch to come closer before extending his hand. If something like that happens with another world leader, I would hope Trump keeps his arms at his side and leaves them just standing there with their arm extended.