The co-author of Donald Trump’s bestselling book “The Art of the Deal” slammed the businessman’s Thursday night speech, saying the he offered no hope and should not be trusted to keep his promises.

{mosads}Tony Schwartz panned Trump’s Republican National Convention speech in a series of tweets Thursday night. He said Trump has “no ideology” behind his policies, specifically singling out his words of support for the LGBT community.

this is the donald trump i came to know. not a word about hope. not a word about possibility. all doom all the time.

— Tony Schwartz (@tonyschwartz) July 22, 2016

Donald Trump in my experience has no ideology. Law and order is what he’s about this week. Never used the phrase before.

— Tony Schwartz (@tonyschwartz) July 22, 2016

my stomach turns at trump defending the lgbtq community. so entirely scripted. the trump i knowwould never have said that in a million years

— Tony Schwartz (@tonyschwartz) July 22, 2016

{mosads}Trump spoke for 72 minutes as he accepted the GOP’s presidential nomination during a speech at the Quicken Loans Arena in Cleveland on Thursday night.

“Our convention occurs at a moment of crisis for our nation,” he said. “The attacks on our police, and the terrorism in our cities threaten our very way of life.

“Any politician who does not grasp this danger is not fit to lead this country. Americans watching this address tonight seen the recent images of violence in our streets and chaos in our communities.”

Trump also vowed to protect the LGBT community from radical Islamic terrorism.

“As your president, I will do everything in my power to protect our LGBTQ citizens from the violence and oppression of a hateful foreign ideology,” he said. 

As the crowd applauded, Trump deviated from his prepared remarks to note the gravity of the reaction. 

“As a Republican, I’m so happy to hear you cheering for what I just said,” he said.