What half of US population do the vast majority of Democrats support? The upper half, that contains?

the responsible, the achievers and the rich OR the lower half, that contains the irresponsible, the slackers and the poor? So, logically, are we better of with more Democrats or less? What kind of shape would we be in if the number of Democrats...say...doubled? Wouldn't logic dictate 2 times the number of all these bad things? Does Math, science and logic lie!