Democrats shouldn't use cheap stories?

I just read on the Democratic website about Mitt Romney's wallet and how he only had $100 bills and could not give a boy a dollar. I'm a Democrat but shouldn't we focus on the real problems with Romney? They fact that he supports RyanCare, he would repeal healthcare reform, he said we should have allowed Detroit to collapse and the auto industry to go to the ground and his plans to end corporate taxes. There are much more important things to bring up than a side show.