The RNC pulled a Trump campaign speaker after she shared the racist conspiracy theory that the Rothschilds secretly control the world

• An activist's scheduled speech at the Republican National Convention on Tuesday was canceled after she retweeted an anti-Semitic conspiracy theory.
• Mary Ann Mendoza, whose police-officer son was killed by an unauthorized immigrant in a drunken-driving incident, was due to speak in praise of President Donald Trump.
• She is also a member of the Women for Trump campaign group.
• Hours before her speech was to take place, she retweeted an anti-Semitic claim from a QAnon account that a Jewish conspiracy was manipulating world events.
• After the message was highlighted by The Daily Beast, the RNC canceled her speech.
• Mendoza deleted the retweet and in a statement said she had not read the full thread of messages before sharing it.

An activist scheduled to speak at the Republican National Convention on Tuesday had her appearance canceled after she shared an anti-Semitic conspiracy theory on Twitter.

Mary Ann Mendoza has campaigned on the issue of immigration since the death of her son, an Arizona police officer, in 2014. He was killed by an unauthorized migrant who was driving drunk.

Mendoza has spoken in support of the president's anti-migration agenda at campaign events since 2015. She also has an advisory role on the Trump campaign group Women for Trump.

Mendoza was scheduled to speak at the conference Tuesday night, but only hours beforehand she shared a thread of messages from an account linked to the QAnon movement.

Mendoza deleted the retweet after a report by The Daily Beast highlighted it. Not long after, her slot at the RNC was retracted.

In a statement cited by ABC News, Mendoza apologized for sharing the thread.

She said that she was "not paying attention to the intent of the whole message" and that the thread "does not reflect my feelings or personal thoughts whatsoever."

She has since set her account to protected status, meaning only selected followers can see her messages.

The original thread, by an account called @WarNuse, remains on Twitter. The account has also promoted the QAnon conspiracy theory, which similarly alleges plots by corrupt elites involved in manipulating world events.

It promotes one of the oldest anti-Semitic conspiracy theories, the so-called Protocols of the Elders of Zion, a purported Jewish plot that was fabricated by the Tsarist secret police in 19th-century Russia and helped inspire Hitler's genocidal policies in World War II.

"The Protocols of the Elders of Zion is not a fabrication," the thread that Mendoza shared said. "And, it certainly is not anti-semetic to point out this fact."

It goes on to groundlessly claim that the Jewish banking family the Rothschilds have been involved in an elaborate secret plot involving the sinking of the Titanic, the instigation of the Vietnam war, and the assassination of President John F. Kennedy.

In a statement Tuesday, the Trump campaign spokesman Tim Murtaugh confirmed the cancellation of Mendoza's speech, which she had been scheduled to deliver by video.

"We have removed the scheduled video from the convention lineup, and it will no longer run this week," he told NPR.

Recent comments by Trump have renewed focus on QAnon, a movement that emerged online whose supporters groundlessly believe that a cabal of Democrats, "deep state" agents, and Hollywood stars secretly control the world.

The movement has been identified by the FBI as a domestic terrorism threat and has been linked to a string of violent crimes. But its influence is growing in the GOP.

It also emerged Tuesday that Trump had invited Marjorie Taylor Greene, a Georgia congressional candidate, to the convention to watch his acceptance speech Thursday. Greene has openly promoted the QAnon conspiracy theory.

But some Republicans have spoken out against the movement, with Republican Rep. Denver Riggleman and Democratic Rep. Tom Malinowski introducing a bipartisan resolution Tuesday condemning QAnon as a "cult" and terror threat.