Elections were happening before black people were allowed to vote and they still swung back and forth between the two parties. Most of white America couldn't care less if black people get disenfranchised. Republicans as they are now are actively trying to suppress the black vote because they know most of us won't vote for the racists running the party.
They've already signaled that they're done with democracy and elections and have been stacking the courts with right wing judges(see how the Trump Judge ruled in the Breonna Taylor murder) and how the conservative leaning supreme court has been ruling. If they win again and if they control the house and the senate, they'll 100% try to get rid of the voting rights act.
They've already tried to weaken it, and succeeded:
en.m.wikipedia.org
And what political party runs Shelby county? See for yourself
en.m.wikipedia.org
The Republicans have to lose at every level and often. If they continue to lose, then they will be forced to come up with policies that work. The trick that democrats have pulled is that they've proposed policies that would benefit black people as well as white people, but because black people have been disproportionately affected by white supremacy and thus have less economic security, those of us who are working class benefit more. Republicans are forced to argue against policies that benefit white and black Americans, and telling white people "but black people might benefit!" Isn't working as an electoral strategy the way it used to, so they're just saying "fukk it" and making shyt up or using courts to force unpopular policies onto the population.
If they keep losing, they'll either stay as losers, continuing to double down on shyt that doesn't work, or they'll have to turn it around. When they took their second L against democrats in 2012, they were getting ready to do just that:
In what they called the 'most comprehensive post-election review' ever made of an electoral loss, the Republican National Committee and a group of project co-chairs unveiled a report today saying that they need to open their playbook and put their 'cards on the table face up' in order to win...
abcnews.go.com
Until Trump came along. Now if Trump loses a second time, he will have not only lost back to back, he will have lost the popular vote
3 times in a row. And Trump is the most popular candidate they've had since Reagan. They have nobody else with as significant of an appeal as him. You saw how easily the people who tried to primary him got crushed.
If the best players on your team are all trash, do you have any chance at winning the championship?