GENETIC FALLACY
"The genetic fallacy (also known as the fallacy of origins or fallacy of virtue) is a fallacy of irrelevance where a conclusion is suggested based solely on someone's or something's history, origin, or source rather than its current meaning or context." (Wikipedia)

Sarah Palin's comment provides the background for the next video clip:

When President Obama made this comment, many viewed it as an Ad Hominem Abusive attack on Vice Presidential Candidate Sarah Palin.