President Donald Trump may hype himself as a master dealmaker.

But thats not how former longtime Trump Organization executive Barbara Res or Trumps The Art of the Deal co-author Tony Schwartz see it. They told MSNBC s Ari Melber on Thursday that Trumps dealmaking skills arent what the president brags them to be.

I never thought he was a great dealmaker, to be honest with you, said Res, who was the organizations vice president in charge of construction. In terms of taking the responsibility for the buck, he just would never do it. Its not in his DNA. Hes never responsible. It is always someone elses fault.

Schwartz, meanwhile, said he recently looked back on Trumps business deals that he unfortunately described 30 years ago and realized that most of the deals in that book were failures.

And the number of deals hes made over the years since then have overwhelmingly been failures, Schwartz added. He said Trump was really one of the worst dealmakers hes ever come across.

Check out the clip above.