"[H]e still thinks he’s above the law, so I’m working to put him behind bars," the Texas attorney general said.

Paxton sued O’Rourke and his political group, Powered by People, last week, arguing that the group was deceptively fundraising for and illegally supporting Texas Democrats’ walkout.

"I write today to encourage an investigation of the entities funding this charade," Cornyn wrote in a letter to U.S. Attorney General Pam Bondi.