Special counsel Robert Mueller's team has approached the White House about interviewing staffers who were on Air Force One when a first statement about Donald Trump Jr.'s meeting with a Russian lawyer was crafted, CNN reported.
Two unnamed sources told CNN Mueller wants to know how the statement was put together, whether information was intentionally left out and who was involved.
The interviews with the White House staffers have not yet begun, and involve only a small number of people, CNN reported.
And Mueller has not asked to interview President Donald Trump. His eldest son went before the Senate Judiciary Committee on Thursday.
Trump Jr. initially claimed in a statement he "primarily discussed a program about the adoption of Russian children" during his meeting with a Russian lawyer he believed to be connected to the Russian government in the summer of 2016.
Emails later released by Trump Jr. revealed he believed the lawyer would provide him with incriminating information about his father's campaign rival, former Secretary of State Hillary Clinton, on behalf of the Russian government.
"Out of respect for the special counsel process, the White House doesn't comment on any individual special counsel request," White House special counsel Ty Cobb told CNN.
White House press secretary Sarah Sanders confirmed in August that Trump "weighed in as any father would" during the drafting of the statement but declined to characterize his involvement further.
According to CNN, Mueller considers some of the aides aboard Air Force One who helped craft the statement to be witnesses — and the White House is trying to figure out legal defense funding for those who have had to hire lawyers.
CNN previously reported Mueller sent a notice asking White House staff save "any subjects discussed in the course of the June 2016 meeting" and also "any decisions made regarding the recent disclosures about the June 2016 meeting."