"No longer a majority" is not the same as "losing".
The TrumpGOP are fully aware that the majority of the country do not support their fascist bullshit. They don't care.
All of the discussion in the establishment press over the last decade about how the changing demographics of America would permanently shift power to the Democrats?
Well, the right read that stuff too.
Initially, they briefly considered attempting to reclaim the majority by diluting their white supremacy (e.g. Rubio's attempt at immigration reform). But their base went berserk (e.g. the Tea Party) as soon as that was suggested, so they gave up on that idea.
Instead, they turned the other way: double down on the racist extremism, and focus energy on rigging the political system to permanently secure minority rule.
It is no surprise that Confederate symbolism is returning. What the GOP has done over the last decade is a repeat of the Slave Power conspiracy of the 1850's. And, now as then, they are not going to give up their hold on power unless they are forced to.