Mueller reportedly subpoenaed Deutsche Bank for Trump finances

Special Counsel Robert Mueller issued a subpoena to Deutsche Bank several weeks ago "to provide information on certain money and credit transactions" for accounts owned by President Trump and his family members, according to a Reuters report that cites "a person close to the matter."

Why it matters: The revelation could illustrate the ever-expanding nature of Mueller's probe, which has long been rumored to be exploring potential financial crimes by Trump and his closest associates.