The Singapore Grand Prix takes place this weekend, where Button is currently in second position and Hamilton holds fourth place and McLaren-Mercedes is in second place.
So you know, when you can say it's OK to come in with a campaign button or a t-shirt, you know somebody is going to be in a polling place trying to hand out literature, trying to talk to people about why they're wearing that t-shirt and trying to promote their candidate.
Button's Brawn GP team-mate Rubens Barrichello finished behind the dominant Red Bulls in third place, to close to within 23 points of Button in the world drivers' standings, with Vettel breathing down the Brazilian's neck.