Unfortunately, there doesn't appear to be an opposition candidate with any particular momentum. Of the 12 candidates running, three are former prime ministers who were pushed out. Wade has had five prime ministers in ten years. Only some of these candidates seem to be using posters, but all of them put their images on the posters. Mustapha here, goes for substance with lots of text about a January conference and his party affiliation. I'm less sure about the meaning of the white cloth. I'm guessing in Senegal it's not surrender
Now Tanor seems to burst with enthusiasm and good will in this image. He's also got the simplicity thing down and even the colors work for him. This poster is green but others are blue. He's got my vote, based on aesthetics.
Now Gadio, however, is another story. Is it the orange color? the creepy smile? That finger pointing straight into your chest while he talks to you, no, it's the gold bracelet, I think. Why do I think his slogan "Liberate the Energy" might really mean "Liberate the Treasury"? The only word I've heard in support of singer Youssou N'Dour is that he doesn't need any money and therefore shouldn't be corrupt. That, at least, would be a nice change.