Which candidate has the best chance of being elected the President of the US, a declared Evangelical Christian, or Satanist?

Lately, to me anyhow, it seem Mitt Romney is getting more buzz, because he is running as an open Evangelical Christian candidate. Would a candidate like Romney who is an Evangelical Christian have more of an edge over a candidate who says he/she is a Satanist, or would the US rather have a Satanist in the White House over an Evangelical Christian? Since we are not speaking of any other types of candidates, lets keep them out of this conversation please.