Michael Flynn Jr., the son of President Trump's ousted national security advisor, is now a focus of Special Counsel Robert Mueller's Russia investigation, per a report from NBC News.

• What he did: He was heavily involved in his father's lobbying work with the Flynn Intel Group, even traveling to Moscow for a gala hosted by state-sponsored RT in 2015 where the elder Flynn dined with Russian President Vladimir Putin. Earlier this year, he held an official transition email address — but his exact role with the fledgling Trump administration was never made clear.
• Another pastime: The younger Flynn remains active in alt-right Twitter circles and was a vocal supporter of the Pizzagate conspiracy theory.
• Our thought bubble: If Mueller wants to flip Flynn to testify against Trump associates, involving his son in the investigation could be a great way to compel him to talk.