According to sources close to the Romney campaign, the former Massachusetts governor may be inclined to tap a mild-mannered, business-friendly Midwestern senator. Senator Rob Portman of Ohio is often cited as someone who fits that profile, but so does Senator John Thune, a 51-year-old native of rural Murdo, S.D., and an ally of Senator Mitch McConnell, the GOP leader. Over on the home page, Thune chats with NRO about the election and the veep chatter.