Again my frustration with being bombarded with political advertising boils to the surface.
You have the candidate ads which are , for the most part, positive. Then you have the party ads who are not quite so positive. Finally, you have the 527 ads which are down and dirty. The thinking is that "We need to keep our candidate looking good so someone else can sling the mud!". The faulty logic here is that I believe both the party and 527 ads can back fire on those they are meant to support.
In the Denver area, a good source for what is true, what is false and what is spin is Channel 4's "Reality Check". Check it out!