Some members of the party of "religious freedom" are trying to oust the vice-chairman of the Republican Party in Tarrant County because he's Muslim. Chairwoman Debbie O'Brien has accused Shahid Shafi of promoting Sharia Law and being affiliated with terrorist groups without any evidence. https://thehill.com/homenews/state-watch/419928-texas-gop-leader-says-colleagues-are-trying-to-oust-him-for-being-muslim
If this wasn't so un-American and dangerous for a working society, I would encourage Republicans everywhere to do this stuff everywhere.
As long as he can prove up the malice, he should be good to go. Of course, that's usually the rub with libel of public figures. Then again, I've never tried a defamation case in any jurisdiction, much less Texas, so not sure about the common law or statutory nuances there.