In addition to Ms. Conway's former company, Councilor Trump said the campaign would sever ties with Adam Geller, a pollster for former Gov. Chris Christie of New Jersey, and Michael Baselice, a pollster for former California governor Arnold Schwarzenegger, both late additions to Mr. Trump's campaign in 2016.
NBC News first reported the decision to oust the pollsters, although it did not identify which ones. Tony Fabrizio and John McLaughlin, two other investigators, will remain in the field.
Mr. Trump has angrily denied having received surveys showing that he was losing or had ordered his associates to refuse them. "These polls do not exist," Trump told ABC News in an interview on Thursday. "I just met someone who is a pollster and I win everywhere, so I do not know what you're talking about."
But on Friday, ABC reported specific information from this so-called fake survey. Data obtained by ABC showed that Mr. Biden led Mr. Trump from 55% to 39% in Pennsylvania, 51% to 41% in Wisconsin and seven points in Florida. The president was leading Texas, a bulwark for Republican presidential candidates for four decades, in just two points.
When the network approached the numbers, Mr. Parscale confirmed their accuracy, but rejected them, saying they were out of date, insisting that Attorney General William P. Barr had already helped the public to to hear publicly. Robert S. Mueller III A redacted version of Mr. Mueller's report has since been published, showing that it was not as favorable as Mr. Barr suggested.
"These disclosed figures are old, in terms of election campaign, of months-long polls that began in March before two major events: the publication of the summary of the Mueller report exonerating the president and the beginning of the Democratic candidates defining themselves with their message left-wing politics, "Parscale said in a statement on Friday.
"Since then, we have seen huge swings in favor of the president in the 17 states we surveyed, based on the policies adopted by the Democrats," he said. "The president is right in saying that we currently have no poll against defined Democrats – this shows that he is losing in none of the states we have tested."