There are lots of web sites, political groups, media folk and organizations (even the candidates’ sites) fact-checking statements politicians make, so it must be increasingly hard to face the cameras.

Some wing it, others –like Joe Biden- completely make it up as they go, only to be found out. Everyone is up for this kind of scrutiny.

Watch Jon Stewart’s approach, running side-by-side video clips that reveal the danger of double talk.

Video scrutiny like this is playing an interesting role this election season. It must force campaign managers to think hard before deploying surrogate snipers on the campaign trail