Mueller's investigation reportedly includes Trump's finances

Olivier Matthys / AP

Special Counsel Robert Mueller's investigation regarding possible collusion between President Trump's campaign and the Russian government has expanded to include Trump's finances and possible financial crimes, according to a new CNN report.

The reasoning: Mueller can investigate any matters that "arose or may arise directly from the investigation," and Trump's expansive real estate web — especially his prior dealings with Russia, including the 2013 Miss Universe pageant — leaves his finances open to investigation. It also allows Mueller to find leads to push Trump business associates to cooperate.

Why it matters: Trump has long resisted close inspections of his finances, and he told the New York Times it would be "a violation" if Mueller made his finances a focus of the investigation.