Why does Obama want credit for jobs he had no hand in providing? Can anyone shed light on this?

Just here in the small town I live in are three (just that I know of) DOT projects that were approved and funded before Obama even came into office. One of them was started in August of last year. Obama recently ordered one of his $1,000+ “OBAMA: Building the Future” advertisement signs to be put up on each the job sights…. but he had nothing to do with the job.

Someone please explain to me why he wants credit for things that he didn’t actually do, and what the point of spending taxpayer’s money on these expensive signs are!