Man winking after LBJ was sworn in

The man on the grassy knoll.

The entire picture is somewhat staged for effect.

There is an apocryphal story that they wouldn't let Jackie change out of the blood-soaked pink suit until AFTER the photo op.

When something is as staged as that, of course there are going to be people who are happy, nay gleeful, that LBJ was now the the president who would be among his closest confidantes and be there for his swearing in.

That's Ted Cruz's father.

I think you're seeing things OP, no wink there

He's trying to come on to him.

"Once we get off of Air Force One, let's ditch the chicks and I'll show you my personal Hail to the Chief..."

He's clearly smiling and winking.