Jewish financier George Soros and Nixon adviser Henry Kissinger are also mentioned.
The thread also claimed that the Protocols of the Elders of Zion – an old antisemitic text known to be fake – was “not a fabrication” and that “it is certainly no anti-semetic [sic] to point out this fact.”
After The Daily Beast published the story, Ms Mendoza – who sits on the Women for Trump advisory board – reportedly deleted the tweet and apologised “for not paying attention to the intent of the whole message.
“That does not reflect my feelings or personal thoughts whatsoever,” she added.
Ms Mendoza, an “angel mom”, had been due to speak to the convention about her son’s death in 2014 due to a drunk driver who had entered the US illegally.