Immigration vs. Energy

You wouldn't like Senator Lindsey Graham when he's angry, explains Ezra Klein, with a follow up.

Why the obsession with Sanford?

I've lost count of the number of articles and blog entries about Mark Sanford, the Republican governor of South Carolina, that I've skipped reading.

As I understand the story, he disappeared for a while, flying to Argentina, where he continued an affair that had been going on for about a year--which he's now admitted to.

Presumably he will not immediately go the way of Fmr. New York Gov. Eliot Spitzer, because prostitution is illegal—whereas having affairs is not.

So why is everyone talking so much about Sanford's personal life? Why do they care?