R.I.P. John Spencer

I was shocked to see this morning that John Spencer, of the West Wing (and LA Law) has died. He's probably the best actor in the entire cast of the West Wing, in my opinion. It's sort of bizarre that he died of a heart attack, as his character on the show had one a couple seasons ago. I wonder how they'll handle this on the show, though honestly, I'd rather see Alan Alda win the "election" going on right now than Jimmy Smits...