Why Trump is facing weaker GOP support

President Trump on Monday again denied any improper conduct with Ukraine, and lashed out at Democrats over the impeachment inquiry. Last week, acting White House chief of staff Mick Mulvaney acknowledged the president withheld military aid to Ukraine in part to force a probe into the 2016 election. Now growing cracks have appeared in Trump's GOP support. Yamiche Alcindor joins Judy Woodruff.