After hours of debate on Saturday, the House voted 121-23 to impeach Paxton, which immediately suspended him from office awaiting a final decision from the Texas Senate, where his wife, Angela Paxton, is a senator.
"The ugly spectacle in the Texas House today confirmed the outrageous impeachment plot against me was never meant to be fair or just," he said, calling it a political sham.
"I look forward to a quick resolution in the Texas Senate, where I have full confidence the process will be fair and just," he said.
Trump, on his social media platform Truth Social, defended Paxton and wrote: "Free Ken Paxton."
Paxton, who had previously served in the House and Senate, has staked out a position on the far right on divisive cultural issues.