George Buck Jr., who is challenging Democratic Rep. Charlie Crist in Florida's 13th Congressional District, threatens Omar and Reps. Ayanna Pressley of Massachusetts, Alexandria Ocasio-Cortez of New York and Rashida Tlaib of Michigan in an email obtained by CNN that was dated November 26 and includes his signature, though he has denied writing it. The email labels the four minority progressive lawmakers, who call themselves "The Squad," as "anti-American" and associates them with Crist.
Asked for comment Wednesday, Buck said in an email to CNN: "I am a decorated veteran of the 101st Airborne Division. As someone who has taken the oath to defend the Constitution, I take that oath very seriously."
He went on in the email to outline the Constitution's reference to treason and Congress' power to enforce punishment, finally stating: "Anyone who commits treason against the United States should be tried to the full extent of the law."
CNN reached out to Omar's office for a response to the fundraising email and was directed to her Twitter page, where she retweeted comments from others, including Tlaib, condemning the message.
"(House Minority Leader Kevin) McCarthy made the decision to remove him and Chairman (Tom) Emmer agrees," he said in an email.
In a statement provided to CNN Wednesday, Crist said, "I'm alarmed and disappointed by the threatening language being used against me and my colleagues."
CNN's Kate Sullivan contributed to this report.