-SNIP- Romney, the 2012 GOP presidential nominee and now the tacit head of the Republican Party, visited Iowa as part of a feverish nationwide tour designed to help the GOP take control of the Senate. -SNIP- Romney is grappling with this question: If drafted, would he answer the party’s call? -SNIP- Former aides and senior Republicans say Romney appreciates the GOP masses crowing that he was right about issues such as Russia and health care. But what really intrigues him, they said, are the vulnerabilities among top-tier candidates in the Republican field. If Romney moves toward a race, it would...