Its hard for people's opinions of other's looks to not weigh on how they view vote or judge someone. While its doubtable that most people consider a politician's looks consciously in their decision making or voting, its hard to really know the full extent of how appearances influence decisions overall.
Although I try not to judge people based on their looks, I accept that it is human nature to do so. When it comes to political candidates, I do not base a final decision on who to vote for on looks or anything that superficial, but of course it factors in. A candidate who is attractive and well groomed is more appealing that one who isn't, but someone who is over processed or groomed is also unappealing. I like a political candidate that looks is attractive but has flaws like everyone else.