I really want to know the answer to this as well. 

Courtesy of the Fresno Bee:

A nonpartisan watchdog group filed an ethics complaint against Rep. Devin Nunes Wednesday, calling for a congressional investigation into how the California Republican is paying for his lawsuits against media companies and critics.

Nunes, R-Tulare, with Virginia attorney Steven Biss filed six lawsuits and sent two letters implying possible legal action in 2019. He has not disclosed how he is paying for the legal work, and the kind of lawsuits he is filing — alleging defamation and conspiracies against him — can cost hundreds of thousands of dollars.

Nunes filed the first case in March 2019 against Twitter, a Republican political strategist and two anonymous social media accounts that mock him. In his most recent lawsuit, filed in December, Nunes alleges CNN published a “demonstrably false hit piece” when it reported a story based on information from an attorney representing one of Rudy Giuliani’s associates.

McClatchy, the parent company of The Fresno Bee, is among the news organizations Nunes is suing. Nunes alleges he was defamed by a news story describing an employee’s lawsuit against a winery in which he holds a financial stake. McClatchy has called the lawsuit a “baseless attack” on local journalism and is contesting the case.

The complaint says Nunes appears to be in “blatant violation of House rules,” because he would have trouble paying for all these lawsuits solely from his congressional salary of $174,000 per year.

The complaint demands that Nunes show records that explain how he is paying for these lawsuits or identify who is paying for them on his behalf. 

If I were a betting man I would wager that it is one of those Right Wing think tanks who are using Nunes to attack media outlets who dare to report information which shows conservatives in a bad light. 

In other words media outlets who report the facts.