Separated at birth?

So, I was over at the Crescat where I like to pop in every coupla days, and I saw this photo of Barack Obama:

And – as has happened every time I have ever seen that picture – my brain started nagging, “who does he look like in this picture? I know he looks like someone! This picture reminds me of someone, who is it?

For months, it’s been right at the tip of my tongue.

Finally, this morning, the name and the image jumped out at me: