GOP National Security professionals warn us about Trump ... (link)

This is from March 2016, but I thought posting the link might help if anyone is trying to convince someone of the danger in electing Trump. There are now 121 signatories:

http://warontherocks.com/2016/03/open-letter-on-donald-trump-from-gop-national-security-leaders/

OPEN LETTER ON DONALD TRUMP FROM GOP NATIONAL SECURITY LEADERS

Snip

His vision of American influence and power in the world is wildly inconsistent and unmoored in principle. He swings from isolationism to military adventurism within the space of one sentence.

His advocacy for aggressively waging trade wars is a recipe for economic disaster in a globally connected world.

Snip

He is fundamentally dishonest. Evidence of this includes his attempts to deny positions he has unquestionably taken in the past, including on the 2003 Iraq war and the 2011 Libyan conflict. We accept that views evolve over time, but this is simply misrepresentation.

His equation of business acumen with foreign policy experience is false. Not all lethal conflicts can be resolved as a real estate deal might, and there is no recourse to bankruptcy court in international affairs.

Snip

Furthermore, his expansive view of how presidential power should be wielded against his detractors poses a distinct threat to civil liberty in the United States. Therefore, as committed and loyal Republicans, we are unable to support a Party ticket with Mr. Trump at its head. We commit ourselves to working energetically to prevent the election of someone so utterly unfitted to the office.
Snip