Originally Posted by Ugly Duck
Its not the population density, its how you carve districts into the population to give your party an advantage. You carve up any weird, convoluted shapes you can to either isolate densely concentrated opponent areas or dilute them by breaking 'em up into pieces & adding the pieces to your areas. Lookit Pennsylvania - Repubs only went 47% for Romney, but have 72% of the house seats. Even though 53% of Pennsylvanians voted for Obama, all the Democrats in Pittsburgh and Philadelphia were cut up & cramed into a mere four seats, and the other 14 were left for Republicans.
Is this sarcasm? Look at it this way - what that map shows is that if you can indoctrinate the city populations, you can control the entire state's electoral votes, despite the vast majority of the landmass voting in favor of one candidate.
Its the democratic plan - make people dependent on the government, group them together, and create the perpetual downward spiral that keeps them in power. Its the same thing happening the whole country over. Poorly ran states / cities where people amass are telling the successful states / counties 'you have to pay for us, despite ourselves'. If you learn your history, its the kind of stuff that leads to civil unrest.