A series of deceptively edited videos targeting House Speaker Nancy Pelosi (D-Calif.) have been circulating on the internet in an effort to make the congresswoman appear as if she is drunkenly stumbling through a speech. Now, her daughter is coming to her defense.

On Thursday, Christine Pelosi accused the GOP and its allies of “pumping this despicable fake meme for years!”

“Now they are caught,” she wrote, adding, “Madam Speaker doesn’t even drink alcohol!”

The tweet then linked to a Washington Post story that debunked altered footage of Pelosi’s speech at the Center for American Progress Ideas Festival in Washington, D.C., on Wednesday. The Washington Post noted the video had been edited to make Pelosi sound as if she was struggling to speak clearly.

The origin of the video, the Post said, remains unclear.