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- JD Vance is set to follow Kamala Harris for three days on her swing-state tour with Tim Walz.
- Republicans are working hard to halt the momentum surrounding Harris' presidential campaign.
- But Vance could falter in his efforts, as his standing with voters remains low.
Vice President Kamala Harris is just hours away from embarking on a swing-state tour with her newly-announced running mate Tim Walz, an effort that's poised to be a major turning point for the Democratic ticket.
But if Sen. JD Vance of Ohio, the GOP vice-presidential nominee, has his way, Harris' time in the spotlight with Walz won't be an easy experience.