Sometimes on YouTube’s YouChoose, we’ll see a link to a video for a candidate that is later taken down and so the link goes to a page telling us we’re out of luck. Last night, there appeared a link to a video promising to show Sam Brownback on a tractor (is that anything like Mike Dukakis on a tank?). Sadly, the video’s not there; YouTube informs us that it was taken down for violating its rules. We’re just not ready for a president on a tractor.