Marion, Iowa -- As we pointed out in Tuesday’s Chronicle, Iowa Republicans look at Mitt Romney as their castor oil candidate. He doesn’t taste right, but he’s supposed to be good for them. So on the trail, Mitt’s later appearances feature less Mitt and more Ann Romney. Or “my girlfriend” as Mitt introduced her. They’re even bringing along three of their five sons in the past few days. As you can see in the below Shaky Hand Productions video, Ann is the Romney who…sit down before you read this…actually will ad-lib before an audience. She comes across as very warm...