White House fights back against House Democrats, calls impeachment inquiry "unconstitutional"

The White House is pushing back against House Democrats' impeachment inquiry, escalating the fight between the two branches of the government. In a letter, the Trump administration called it unconstitutional and a violation of due process. CBSN legal contributor Keir Dougall, a former assistant U.S. attorney for New York's eastern district, joined CBSN to discuss where the Trump administration's argument stands legally.