Sarah N. Lynch is the senior Justice Department reporter for CBS News, based in Washington, D. C. Four Democratic members of Congress are asking the top internal watchdogs at 16 different federal agencies to investigate whether former lobbyists appointed by the Trump administration may have violated ethics rules to benefit their own former clients.

A crypto titan who has been accused of defrauding numerous mega investors -- including Mark Cuban -- has ramped up spending in Washington as he tries to push through an IPO of his company.