I made a mistake on the last question so will answer 2 of them here.

As far as I know no one has ever run on an atheistic platform. Even in the most secular voting districts it would probably not be a particularly useful position to take.

In some areas such as the southeast and midwest them there atheists probably make up less than 5% of the electorate. On the coasts it will be markedly higher espeically urban areas, maybe a quarter to a third in NYC or San Francisco.

The great majority of nontheists are progressive liberals. However, there is a large minority, maybe a quarter to a third, that are libertarians in the mold of Ayn Rand. For example I have info that David Koch is an atheist.

Of course the Christian Bible contains the 1st explicit description of socialism enforced by death (in Acts), that the religious right is anti-socialists is one of the geat political scams of our time.