CNN and other outlets first reported the numbers -- which showed Trump trailing Joe Biden in states like Michigan and Wisconsin -- weeks ago, but a purge of the polling team was proposed after Trump grew angry about coverage of the numbers in recent days. Campaign officials were frustrated after the detailed numbers of four of the 17 states polled leaked to outlets like ABC last week.

Michael Baselice, the president and CEO of Baselice & Associates Inc., is one of the pollsters the Trump campaign has let go, a Republican familiar with the matter told CNN. Baselice, who is based in Austin, Texas, joined the Trump campaign near the end of the 2016 election cycle and had been close to Trump's 2020 campaign manager Brad Parscale, the person said. Adam Geller, who was also a pollster for the Trump campaign in 2016, was another who was let go, according to another Republican familiar with the situation.

The campaign also cut ties with Brett Lloyd, president and CEO of The Polling Company, the former firm of White House senior counselor Kellyanne Conway, a source familiar with the matter said.

Baselice and Geller are expected to begin working instead with America First, the pro-Trump super PAC, the source said. Lloyd is not expected to continue working with any Trump-affiliated entities.

Read More