For the exact reason that we are the only party that can manage to make ourselves sound like unfaithful lovers to voters, and we really want a second chance:
I love the leaflet design, the visuals, the "slogan" (if that's it, better than "Fighting For You" in my opinion), and even the picture of a smiling Rae against the outline of Toronto.
Not that "We want you back" is the best campaign slogan ever, but it gets the point across well, doesn't it? We messed up, we know it, now we're changing, baby. Take us back.