Carly Fiorina will deliver remarks via video at the Nevada National Security Action Summit next week despite the event's host being the leading organization defending Donald Trump's proposal to bar Muslims from entering the U.S. — a proposal Fiorina has suggested is unconstitutional.

The summit, scheduled for Monday, Dec. 14, is the fourth in a series of national security-centric summits organized this year by the Center for Security Policy (CSP), a Washington-based think tank founded by Frank Gaffney.

Gaffney is a leading anti-Islamic figure and member of the birther movement, who was condemned by the American Conservative Union in 2012 for suggesting two of its board members were agents of the Muslim Brotherhood. He is also an advocate of Trump's proposal.

"We have called for a moratorium on the introduction of more Muslims, particularly from countries with a tradition of Islamic supremacism, until we have a basis on which to evaluate effectively, accurately, whether they are ... actual or potential jihadists," Gaffney said during a radio interview Tuesday.

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