Democrats underscore national security

It's all about national security. That's the message House managers hammered home on their final day of opening arguments. Their performance has been praised - even by some Republican colleagues - but have they changed any minds? And who are they trying to convince - GOP senators or American voters? Plus, as President Trump's defense team prepares to take centerstage, CNN political director David Chalian previews their strategy with CNN legal analyst Jack Quinn and CNN White House correspondent John Harwood. via Knit