Also, do what you can to defeat this bill.
Because it will shore up restrictive immigration bills that discriminate based on English literacy.
And to defend oppressive policies that will allow Federal agencies to discriminate in their duties serving people who don’t speak English as well as their more-privileged fellow citizens.

If you understand language acquisition at all, you’ll understand why designating a national language in the US is unnecessary and racist, with a good underpinning of classism, as well. That’s not even considering the history; just from a language standpoint it hasn’t a leg to stand on.