Their might be the occasional exception when one of their venal sock puppets looses to someone who has a conscience, but that someone would be an exception to the rule, and their influence marginalized to little or no affect.
But for the most part, the idea that we live in a Democracy is nothing more than an illusion that is intended to make the slaves think that they have control over their leaders, and sovereignty as a nation, but nothing is further from the truth.
Why the voters refuse to see this is a tragedy of our own psychology, i.e. the impoverished understanding of our own minds, as well as the minds of predators.
What we don't know can and will be used against us.
The good news is that we are capable of learning, the bad news is that most refuse to learn because the truth conflicts with all their comfortable beliefs, and the natural tendency is to avoid cognitive dissonance at all cost.
And this avoidance creates a phenomena that has plagued the human race for time immemorial, or as Thomas Jefferson said, "all experience hath shewn that mankind are more disposed to suffer, while evils are sufferable than to right themselves by abolishing the forms to which they are accustomed."
Fact is that, if we want change for the better in this country, we need to change the way we elect our government, and if we could get that right, we could change the World for the better.