I'm very surprised that you hadn't heard Trump's accent before, being so familiar with NYC and environs. It's not as if he hasn't been a highly public figure for more than three decades.
How did he evade your detection?
Yes, yes, I do know that he's been on T.V. for decades, on different shows as well as his own, but I NEVER watched any of them.
And there were and are still several thousands of different NYC accents. I never claimed to know ALL of them. :-)