John Gill Commentary Mark 15:2

"And Pilate asked him, Art thou the King of the Jews? And he answering saith unto him, Thou sayest." — Mark 15:2 (ASV)

And Pilate asked him, are you the king of the Jews ?
&c.] Which either he had heard before that it was said by him, and his followers; or was what the Jews now suggested to him as his crime, which they desired sentence of death might pass upon him:

and he answering, said to him, you say it ;
which is all one as if he had said, I am; (See Gill on Matthew 26:25); for so he was in a sense, in which he explained himself to Pilate's satisfaction, (John 18:36John 18:37) ; (See Gill on Matthew 27:11).