Because hopefully you have been paying attention and can read the tea leaves.
The new political strategy this past decade by republicans has been to gas up and empower white racist,using coded language to cause fear,and inspire them to get black and brown people the fukk out of here,because its us making their lives miserable

This is their political strategy all over the country,and if you understand this is the strategy what do you think they will continue to do and say to get these white racist passionate enough to go out and vote. I can tell you whatever it is it DEFINITELY won't be good for black people,and will potentially be generation changing. Don't get me wrong democrats might up the anty to show they hate nikkas too,we saw how BIll Clinton and Hillary sold nikkas out.
These people will do whatever it takes to win,I'm not saying vote democrats because they truly care and won't switch up on blacks in a heartbeat.
But it is important to start really impacting these elections locally and national,if only just to make both sides cautious about jumping the shark when it comes to pandering to white hillbilly rural racist idiots.
If a democrat doesn't beat Trump,mark my words the next democratic candidate will be a bigger racist than Trump.
And then what do you think will happen?Republicans will have to give voters an even more racist candidate to try to win the one after that

. You'll have a guy "subliminally" suggesting slavery may be a good idea,then denying he/or she meant it like that

,but the hearts of racist would have been won already.
Also not to mention,getting involved politically is more than voting,but its all we have at the moment. Since we are not collectively greasing any palms with campaign contributions. Money+votes play a part in political power,I can't tell you which weighs more heavily to be honest. I would say both weight heavily at different stages.