A national field director for the left-leaning Americans United for Change was fired on Monday after the release of an undercover video that showed him saying he hired mentally ill people to protest at Donald Trump Donald John TrumpBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Pelosi: Trump Supreme Court pick 'threatens' Affordable Care Act MORE events.

Scott Foval, the now former national field director for Americans United for Change, describes in one video how he convinces people to do “conflict engagement” at rallies for the GOP presidential nominee.

“We have mentally ill people who we pay to do shit, make no mistake,” he says.

Fovall also said he wanted his hires to be attacked at Trump events.

“If you're there and you're protesting and you do these actions, you will be attacked at Trump rallies. That's what we want,” Foval says on the undercover video released by conservative activist James O’Keefe. “The whole point of it is that we know that Trump's people will freak the f--- out, his security team will freak out, and his supporters will lose their shit.”

Americans United for Change dropped Foval after an initial O’Keefe video was released.

“Americans United for Change has always operated according to the highest ethical standards,” said Brad Woodhouse, the organization's president, in a statement to Fox News. “Scott Foval is no longer associated with Americans United for Change.”

O’Keefe released a second video on Tuesday that claimed to show Foval planning “to commit voter fraud on a massive scale.”

In that video, Foval goes into detail about how he “thinks backwards” to avoid prosecution when planning to bus voters into red states. The methods he describes include using “shell companies” for rental cars.

“It’s a very easy thing for Republicans to say, 'Well they’re bussing people in.' Well you know what? We’ve been bussing people in to deal with you f---in’ assholes for 50 years, and we’re not going to stop now, we’re just going to find a different way to do it,” Foval says.

The comments come as Trump argues the presidential election is rigged against him, a statement that has drawn criticism from Democrats and Republicans alike.

Following the release of the second video on Tuesday, Donald Trump Jr. touted O’Keefe’s findings on his Twitter account:

Anyone think #MainstreamMedia would be silent if @JamesOKeefeIII exposed GOP committing voter fraud? Time for them to hit Trump instead! — Donald Trump Jr. (@DonaldJTrumpJr) October 18, 2016

O'Keefe is known for producing undercover videos targeting Democrats. He is perhaps most well-known for his undercover investigative videos of employees working for the community activist group ACORN.

Democrats have criticized O’Keefe for selectively editing his videos.