Story highlights "You should be hung for treason Stefani," the email said.

Paladino stood behind his original email

Cleveland (CNN) Former New York gubernatorial candidate and Donald Trump backer Carl Paladino doubled down Friday on a threatening email he sent to an anti-Trump delegate last week, saying she should not get her "underwear ... all bunched up" about it.

Paladino sent an email to Utah delegate Stefani Williams telling her she should be "hung for treason" last week, according to a copy forwarded by Williams to CNN and first posted on Renew America . The email came after Williams posted an open letter on the conservative grassroots advocacy group's website calling on delegates to "dump Trump."

"You should be hung for treason Stefani. There will not be a Republican Party if you attempt to replace Trump. I'll be in your face in Cleveland," the email said.

Paladino, a Buffalo businessman who unsuccessfully ran for New York governor in 2010 and has been an outspoken supporter of Trump and co-chaired his New York campaign, was reacting to the effort by some delegates to deny Trump the nomination by voting for someone else despite primary results. That plan was designed to attempt to deny him the majority he would need to clinch the nomination. The effort was dealt a resounding defeat late Thursday night at the RNC Rules Committee.

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