Mueller wants to interview White House staff about misleading Trump Jr. statement

Special Counsel Robert Mueller's team has asked the White House about interviewing staffers who were on Air Force One when President Trump helped his son draft a misleading statement about the purpose of his meeting with a Russian attorney, CNN reports citing three sources familiar with the conversations.

• What is Mueller is hoping to learn? Whether information was purposefully excluded from the statement, and who was involved, according to the sources.
• Why it matters: Mueller's investigating something that directly involves Trump, and he wants to get top staff on the record as part of his investigation.
• Flashback: Trump Jr.'s initial statement claimed that he primarily discussed adoption in the meeting. Later, he released emails revealing he believed the Russian lawyer would provide him with incriminating information about Hillary Clinton.