Business Insider reports:

... Trump and his campaign spokesperson did not respond to requests for comment. In a statement to The Hollywood Reporter, Trump Campaign Manager Corey Lewandowski denied hiring actors and said he never heard of Extra Mile Casting.

"Mr. Trump draws record crowds at almost every venue at which he is a featured speaker," Lewandowski said. "The crowds are large, often record-setting and enthusiastic, often with standing ovations. Mr. Trumps message is 'make America great again.'"

Business Insider attended Trump's announcement and spoke to some of the people who were there cheering him on. They said they were not paid by the campaign.

As he began his speech, Trump remarked that there were "thousands" at the event. In our estimate the crowd was much smaller. However, a Trump spokesperson said the audience included many people in his headquarters, Trump Tower, who may not have been visible to the press in front of the podium.

"There were a lot of people probably that you couldn't see," the spokesperson said.