“Höhenflug” is the act of (figuratively) ascending to some higher plane (not an imminent danger here) but losing touch in the process. “Bodenhaftung” is literally grip (get one, please!) or traction, so best illustrated by sitting on a tractor. What better way to show that you are down to earth (pun intended) and in no way out of touch than riding this nifty little machine in your best dark suit, as any local farmer would? Bonus points for gratuitous use of “frischer Wind” (a breath of fresh air), quite possibly the most overused phrase in German politics and code for not being incumbent.
The local Liberal Democrats never fail to amaze me. Just when I thought it could not get any better, I found another gem for my ever growing collection.