Updated 9:15 p.m., Friday, 6/14
(CNN) - Real-estate mogul Donald Trump said Friday night that Mitt Romney's team asked him to appear in a "commercial" for the campaign last year–but it never saw the light of day.
The video, he said, was supposed to run during the Republican National Convention and featured Trump sitting in his office with an actor who looked like President Obama. After telling the faux president "what a lousy job" he's done, Trump said, he delivered his famous line to the actor: "You're fired!"
Speaking at a conservative gathering in Washington, Trump boasted that Romney's team loved the video yet never used it because it was "too controversial."
Since Romney lost the election, Trump has not been shy in blasting the candidate as a weak nominee for the party. At the Faith and Freedom Coalition Friday night, Trump criticized Romney for having poor television ads and not performing well in the last debate.
Trump endorsed the former Massachusetts governor in the GOP presidential primary. He said he was asked to help campaign for the candidate in six primary states, which he did through robo-calls and appearances. Trump made sure to point out that Romney won all six of those states.
The multimillionaire said he felt "slighted" that Romney's staff stopped calling after the primary, so he was pleasantly surprised to get the phone call about filming a "great commercial."
“The concept was (the actor) was sitting at my desk, and I was on the other side of the desk. And I was telling him what a lousy job he's done. You're doing bad here. You're doing bad there. You don't know what you're doing," he said. "(then) I say 'President Obama, you're fired!'"
"They never put it on,” Trump added. “The reason they didn't put it on is because they thought it was too controversial. Controversy. It might not be politically correct. And it was very sad, and I didn't do any work for him–I mean, I would have, but again they didn't ask me–because I think they thought I was too controversial, more tough.”
"I think it would have brought down the house," he added, offering high praise of the video.
Before the Republican convention in August, Trump teased that he would have a "memorable" role at the event that wasn't a speaking role.
"I was asked to speak at the RNC but said no, because I will be doing something much bigger-just watch!" he tweeted ahead of the convention, held in Tampa, Florida.
However, the convention's schedule got switched around at the last minute when organizers scrapped the first day due to a hurricane. Trump's big surprise was scheduled to happen on that first day and wasn't rescheduled.
The "commercial" was just one example of how the Romney campaign did not use Trump enough on the trail, the multimillionaire argued.
One state where he could have really helped Romney, Trump stated, was Florida, because of all the property and businesses he owns in the state.
"They like me in Florida," he said, adding he assumed they would call him up.
But they never called, he added.
"I was a little bit, like, surprised."