McCabe is facing potential criminal charges over allegedly lying to internal investigators at the FBI.
The Justice Department inspector general began a review of Comey and McCabe in 2017.
“It feels awful every day. It keeps me up nights."
The fund has collected $554,520 from more than 13,200 people since March 29.
The attorney general said the FBI and Justice Department needed to gain back the country's "confidence."
Trump has said the FBI disliked Comey, but the emails suggest otherwise.
McCabe’s departure comes as Trump and Republicans step up attacks on the top law enforcement agency.
In a heated phone call, Trump reportedly lashed out at the wife of Andrew McCabe, who stepped down as FBI deputy director Monday.
Bowdich was associate deputy director under Comey and was involved in the response to the San Bernardino shooting.
Trump and his allies had scrutinized McCabe for campaign contributions his wife once received.
President questioned top FBI lawman on how he voted, raising concerns amongst former officials.
After Christopher Wray’s threat, the attorney general apparently backed off from his call to fire Andrew McCabe.
Andrew McCabe has been a target of both Jeff Sessions and President Donald Trump.
Trump and other Republicans have accused Andrew McCabe of misconduct.
Public figures including John Brennan and Joe Scarborough have said they donated.
Yates, jumped at the defense of the FBI’s Deputy Director Andrew McCabe in a nod to 'A Christmas Carol.'
The president has called out James Comey and Andrew McCabe.
His office said it removed Peter Strzok over allegations about text messages.
Trump tweeted in July: “Problem is that the acting head of the FBI & the person in charge of the Hillary investigation, Andrew McCabe, got $700,000 from H for wife!”
Senator Chuck Grassley, chairman of the Senate Judiciary Committee, has championed the accusation involving Andrew McCabe for months
The NSA director and National Intelligence Director Dan Coats responded to media reports that Trump had tried to interfere with the FBI's Russia investigation.