This is a likeable picture of then-Senator Senator Obama from the 19 May 2008 cover of Time.
He is smiling and may be relaxed. To me he seems deeply tired. Tired to the bone. I am sure Senator Clinton felt the same.
I marvel at the incredible feat of endurance that is required of candidates running for high office in the US. If it doesn’t kill them first, I suppose this may ensure that candidates have the strength to serve.