So Obama is so  out with synch with  working class slobs he doesn't know how to use a credit card reader:

http://www.truthrevolt.org/news/gaffe-obama-visits-gap-amazed-credit-card-machine

The lefties took George Bush Sr. to task back in 1992 when he was baffled by a grocery scanner as if it was Star Trek technology

http://www.mrc.org/articles/great-george-bush-sr-grocery-scanner-urban-legend-lives