Yes, they can. They have multiple options, some easier than others.
First option is to simply pick up and move out of that district.
Second option is to fight to get the district lines changed to something more equtable.
Third option is to fight fire with fire, and bring up a candidate that the opposing party would be willing to vote for. In the case of battling against a mostly black district, find someone of the same color, but with a more conservative viewpoint than McKinney. Doesn't have to be polar opposite, someone more towards the center. Any change is better than just bending over and taking it without doing anything to resist.
I'm sure there are more options, those 3 just popped into my head. Give it some more thought, and I'm sure there are even more alternatives.
It's not that you aren't explaining your point. I understand what you are saying, but I think you are wrong. The power of the vote is what gives every adult in the country power. You have the power to change your government without the use of firepower or lynchmobs. All you have to do is get involved and vote. As a result, you get the government you are willing to accept.
Don't like it? Change it. Don't feel like making the effort to change it? Then deal with the consequences of your apathy.
And that does somenthing about Mckinney how?
Second option is to fight to get the district lines changed to something more equtable
Easily said - I can say if you just try hard enough you can float up in the air. District lines were set by legislature at direction of judges.
Third option is to fight fire with fire, and bring up a candidate that the opposing party would be willing to vote for. In the case of battling against a mostly black district, find someone of the same color, but with a more conservative viewpoint than McKinney.
Done that had a black republican female candidate - lost about 83% to 17% of the vote. The sad fact is that the majority of the idiots in her district think exactly like she says she does (at least the ones who vote for her). They harbor intense envy and resentment of whitey for being successful while reveling in ignorance and the hip hop culture. The only way to change it would be to completely change the urban black culture of "do nothing, learn nothing, and gimme" to a culture of hard work and striving for success. You would have to undo nearly 50 years and several generations of entrenched welfare dependency and anti-achievement mentality (primarily induced by the LBJ "great society") And if you can do that, then my hat's off to you. (Some people are beyond redemption)