Trump’s Inquisitors: How far will the Democrats go with their new found investigative powers?

This week, Democrats returned to Washington with the authority to investigate a Trump White House that is suspected of foreign collusion, conflicts of interest, and mismanagement of the federal government. How far will they go, asks Jason Zengerle

As political life kicked back into action in Washington this week, a number of letters were in circulation. All were sent by US Representative Elijah Cummings.