Imagine that Republicans keeps winning elections, and Democrats fall to maybe 15% of the voting population. They win some State Governors here and there, But ultimately Republicans control almost everything. And at some point to be a successful politician you simply have to be a Republican. There is still voting but it's really unlikely that a democrat will ever win. And let's say this actually goes on for the couple of decades. Would you like this?
Same question to the Democrats. But obviously the Democrats are in power.