Sadly, yes, but it's not everywhere. Jerrymandering is used by both parties to lock-in districts for particular candidates. Then voter suppression is used to keep people away from the polls, mostly used by the old Jim Crowe states, this nonsense dates back to slavery from which the US is still recovering.

'Democracy in America', by Alexis de Tocqueville is still about as valid today as when it was written. In that he describes this scene where townspeople literally shoot at a farmer to keep him away from the polls. Not all that different than the gun toting individuals who show up to polling places today to 'protect' the vote.