U.S. Senate lobbying records show Delrahim lobbied for Anthem last year on “antitrust issues associated with Anthem’s proposed acquisition of Cigna.” Anthem paid Brownstein Hyatt $400,000 for that lobbying work, the records show. Delrahim was not immediately reached for comment Friday.

Earlier this week, a group of former Obama administration lawyers urged the Justice Department to investigate whether the Trump administration has communicated to the Justice Department about the Anthem-Cigna case, according to The Washington Post. The group, United to Protect Democracy, sent the letter to DOJ Inspector General Michael Horowitz.

“We are concerned that administration officials may have engaged in inappropriate conduct regarding the Anthem-Cigna litigation,” the letter said. “Were the White House to engage in any contacts with DOJ about this ongoing antitrust enforcement matter, it would substantially undermine Americans’ confidence in the Department’s commitment to equal justice under law.”

The White House didn’t respond to a request for comment Friday. But a White House official, according to the Post, called the letter meritless.