“Oh, I can’t think about this now! I’ll go crazy if I do! I’ll think about it tomorrow. But I must think about it. I must think about it. What is there to do? What is there that matters?” —Scarlett O’Hara, Gone With the Wind Like the calculating Southern belle in Margaret Mitchell’s classic novel, who endeavored to ignore the realities and consequences of war, Sen. Blanche Lincoln is bent on making the rest of us believe she is the most reluctant participant in the most epic of legislative wars. Lincoln, the last holdout, didn’t want to be on the...