Voters dislike negative advertising. And voters don’t like super PACs very much. But perhaps I repeat myself. Check out this animation of spending by super PACs over time from Northeastern University’s Lazer Lab, last seen in this space with another infographic on fundraising. This video breaks super-PAC money down by both partisanship (Democratic vs. Republican) and tone (negative or positive). The video has sound, but I actually recommend listening to it without, unless you enjoy cacophonous cheering and jeering. The figures run through September 13, the latest figures available from the FEC.