Vice President Pence said the Trump administration will launch a “full evaluation” of voter fraud, according to The Guardian, citing leaked audio.

In audio obtained by The Guardian, presumably recorded at the GOP’s retreat, Pence said there will be an evaluation of “voting rolls in the country and the overall integrity of our voting system this past election.”

Earlier this week Trump pledged there would be an investigation into voter fraud, based on unfounded claims that 3 million to 5 million votes were cast illegally. 

{mosads}According to The Guardian, the leaked audio captured a conversation between Pence and Alabama Rep. Mo Brooks (R), who said Trump was “spot on” on calling for an investigation. 

“We’ll be looking at ways to work with you and follow the facts and see where the facts go,” Pence reportedly told Brooks.

Trump is expected to sign an executive order on voter fraud sometime in the following week. The signing, originally set for Thursday afternoon, was delayed.

Trump won the Electoral College in November but lost the popular vote to Democrat Hillary Clinton by nearly 3 million votes. He later tweeted without evidence that millions of “illegal” immigrants had voted.

Several top Republicans have said there is no evidence of such widespread fraud.