To bond with “everyday” Americans, Hillary Clinton left her million-dollar Chappaqua, N.Y., mansion Sunday in the “Scooby-Do Mystery Machine” van, bound for Iowa. It was déjà vu all over again: In 1999 she started her U.S. Senate campaign by driving around upstate New York in a van also called “Scooby.”

While Mrs. Clinton’s hard-core support base makes her a formidable candidate, she has little room to grow. Those who oppose her are many and feel strongly while undecided voters appear to lean against rather than for her, and it’s hard to get a first introduction with voters for the third or fourth time.

The new van’s leather interior, 29-inch flat-screen TV with Blu-ray, and a power sofa that converts into a bed won’t turn Mrs. Clinton into America’s middle-class granny, especially after the salesman who helped deliver it explained, “It’s very luxurious.”

While Mrs. Clinton’s hard-core support base makes her a formidable candidate, she has little room to grow. Those who oppose her are many and feel strongly while undecided voters appear to lean against rather than for her, and it’s hard to get a first introduction with voters for the third or fourth time.

There’s a weirdness to this trip, a lack of excitement and purpose that seems a metaphor for Mrs. Clinton’s campaign. The principal photo op Monday was courtesy of a Chipotle’s surveillance camera in Maumee, Ohio, that caught her and senior adviser Huma Abedin in dark glasses ordering lunch, looking like they were on the lam.

Ms. Abedin was an interesting traveling companion. Iowa Sen. Chuck Grassley has asked why she drew a $135,000 State Department salary as a top aide to Secretary Clinton while getting special dispensation to simultaneously take $355,000 more from Teneo, a public-affairs shop—founded by a former aide to President Bill Clinton—that supplies political intelligence and advice to U.S. and foreign companies. The State Department Inspector General announced Friday that he is investigating the issue.

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Karl Rove joined Fox News Channel as a political contributor in February 2008. He also currently serves as a columnist for the Wall Street Journal. Mr. Rove helped organize the political-action committee American Crossroads. His latest book is "The Triumph of William McKinley: Why the Election of 1896 Still Matters" (Simon & Schuster, 2015). Follow him on Twitter @KarlRove.