From your source: "Democratic lawmakers in the Lone Star State have urged caution "because we have consistently seen Texas politicians conjure the specter of voter fraud as pretext to suppress legitimate votes, we are naturally skeptical," according to Dallas state Rep. Rafael Anchia. "
Trump has claimed there were illegal votes in the 2016 election, too, but no proof has been found of it.
BTW, Even Paxton only claims those votes were from 1996 to now. That's 23 years, for perhaps an average of less than 2000 votes a year. In a state with more than 25 million people, that's not enough to influence any elections.
Those people are paying taxes. Why shouldn't they have representation?