Chaffetz told reporters at the congressional GOP retreat Wednesday in Philadelphia that if Trump wants an investigation, he can get the Department of Justice to look into it. He's not interested.
"On the voter fraud issue that really happens at the county level. I don't see any evidence, but the President has 100,000 people at the Department of Justice that if he wants to do an investigation, have at it. I just don't see any evidence of it," Chaffetz said.
When asked if he thought it might be a waste of time or taxpayer dollars, Chaffetz said, "That's why I'm saying the Oversight Committee is not planning to do anything with it."
During a meeting with congressional leaders earlier this week, President Trump told members of Congress that he believed he'd been denied the popular vote victory because millions of undocumented immigrants cast ballots illegally in the November election despite the fact that evidence of widespread voter fraud does not exist and has been continually disputed by studies.
Chaffetz said it's up to Trump if he wants to spend DOJ money on voter fraud investigations.
"That's his decision to make," Chaffetz said. "It's not something we're pursuing."