The two PACs being probed, Brand New Congress and Justice Democrats, were both set up by Chakrabarti to support progressive candidates across the country.

But they funneled more than $1 million in political donations into two private companies that Chakrabarti also incorporated and controlled, according to Federal Election Commission filings and a complaint filed in March with the regulatory agency.

In 2016 and 2017, the PACs raised about $3.3 million, mostly from small donors. A third of the cash was transferred to two private companies whose names are similar to one of the PACs — Brand New Congress LLC and Brand New Campaign LLC — federal campaign filings show.