Lukewarm take incoming:
GOP senators voting for Juneteenth to be a national holiday is actually a brilliant move. Now if there is a bill to make election day a national holiday, they’ll say “We can’t afford another one, we just Juneteenth. It’s not that we’re anti-voting. We’re just trying to be fiscally responsible.”
They can also use it as an all-purpose anti-racism defense. “The suggestion that I’m racist is absurd. I’m the least racist person there is (after Dear Leader Trump, of course). FFS, I even voted for Juneteenth to be a national holiday. How can I possibly be racist?”