subpoena

A federal judge in Washington was skeptical in the face of arguments that current and former Oval Office aides have "absolute immunity" from ever sitting for questions about interactions with Trump.

House Judiciary Committee Chairman Jerry Nadler, D-N.Y., says his panel is investigating allegations of obstruction of justice, corruption and abuse of power by the president and other officials.

The federal inquiry seeks information about who donated to events connected to the inauguration and what they were promised in return.

Can the Justice Department subpoena the president? Can Trump invoke his Fifth Amendment right not to give evidence? Answers to questions about the ongoing Russia showdown.