Walz in a debate really has two choices:
Lie about every position he has,
or,
Lose the debate because 80% of America won't agree with the radical Left on anything.
For example, if the border and illegal immigration come up what will Walz say? He can't openly say he's for open borders and legalizing all 20 million + illegals in the US. So, his only real choice is to lie about his position on that issue.
Same goes for taxes, foreign policy, energy policy, environmental issues, etc. Walz either lies or loses.