Didn't you all know that fact checking is a violation of the Republican's 1A rights to lie their asses off and passing it all off as the factual truth?
What CBS did was to bless Vance with a license to tell lies and cover those those lies with even more lies and simply run Walz over with'um. So if Walz is not able to stay ahead of that hoax generating steamroller, he will be forced into a backpedaling defensive role playing truth cop to Vance's bullshit frag fest and we all know catchy feely lies play a whole lot better than dull factual truths.
He should do what Harris did to Trump by warning the viewers of what to expect from Vance from the get-go, then keep pounding away at the "See? I told you all what he'd do!" and "There he goes again with the lies!!" and "What did I previously warn you of? Well there you have it".
It seems if Vance is allowed to lie at will and not back those lies up with hard factual evidence then Walz needn't fact check him with facts either. All Walz needs to do is keep reminding the viewers that Vance is repeatedly lying and have the CBS moderators query Walz over his accusing Vance of telling fairy tales and hoax horror stories, giving Walz the opportunity to go on the offensive with a serious dose of hell raising fury that the CBS moderators would die for and not cut off Walz's fact checking rampage with the time limit rule.
Of course, that CBS gave Walz their job of keeping Vance in check is mainly for the entertainment/ratings value and nothing to do with having a dull boring ratings murdering honest fact based debate.