Adam Schiff in Vox Media

On Principles & Values: Trump accepting assistance from Russians is criminal

Schiff, in his closing questions to Mueller, asked if "knowingly accepting assistance from a foreign government," to which Mueller responded "a crime."

Schiff continued, adding that if knowingly accepting assistance from a "foreign government during a presidential campaign is an unethical thing to do."

"And a crime in certain circumstances," Mueller responded.

Schiff questioned whether public officials acting unethically "exposes them to compromise particularly in dealing with foreigners."

"True," Mueller responded again.

Schiff, in that brief interaction, helped cut to the center of why the Russia investigation was so critical--and why America needs to pay attention to the results.