Scott Walker on the Romney campaign: "I think there’s a lot of caution."

"I think the mistake that they’ve made is the feeling like it can just be a referendum on the president... It’s certainly a part of it for any incumbent; it’s got to be a referendum on, do you like or dislike, not just the president, but his policies … but there’s got to be something more. People don’t just vote somebody out; they’ve got to vote somebody in."

This was on "Morning Joe" and reported in Politico, which mentions that Walker "recently survived a recall election," but not that one of the reasons he won was that his opponents tried to make it a referendum on him.

The Wisconsin governor... cited Boston’s “big dig,” a massive, problem-laden infrastucture project as a time when Romney “came in, rolled up his sleeves and said, ‘I’m taking control.’... I’d like to see him do that,” he added.