"Rather than setting expectations and influencing the burden of proof in the debate, an alternative Walz strategy might be to out-appeal Vance as the extraordinary ordinary citizen appealing to the ordinary voters, and point out past contradictions of the opposing presidential candidate," Preston added.

Katie Pavlich and Monica Crowley tell 'The Ingraham Angle' what they expect from JD Vance and Tim Walz at the CBS News Vice Presidential Debate Tuesday.