A group of 15 Georgia military veterans released an open letter to Georgia voters Monday that casts Donald Trump as "dangerously clueless" and a threat to the U.S. Constitution.

Here's a snippet of the letter, distributed by VoteVets.org, a national veterans organization that opposes Trump:

Not all of us see eye-to-eye with Hillary Clinton. But for all of our serious issues with her over policy, we do not believe she will be hostile to the heart of our way of life – the Constitution of the United States. Donald Trump will be hostile. What's worse, he has not even tried to hide it.

In four years, with a Republican candidate who is not a threat to our Constitution, this country can have a referendum on the Presidency of Hillary Clinton. But, this year, in this election, all of us stand ready to continue our oath, and do all we legally can to ensure that a threat like Donald Trump never seizes power.

Trump and Democrat Hillary Clinton have both fought to earn the votes of the nearly 21 million veterans in the U.S., an influential bloc in states such as Georgia with several military bases and a heavy presence of former soldiers. An estimated 750,000 veterans live in the Peach State, about 8 percent of Georgia’s total population.

Trump has made an overhaul of the VA one of his signature campaign proposals, vowing to make the agency’s health care system more privatized. Clinton, too, has promised to remake the agency and bring more transparency.