Bill Clinton had already established liberal interventionism as the Democratic counterpart of neoconservatism on the Right, and Barack Obama furthered it as R2P, especially at the instigation of Secretary of State Hillary Clinton. Now Killary is running with it, joined by neoconservatives disaffected with Donald Trump's foreign policy realism, coupled with the manufactured "need" to confront Russian aggression based on revanchism.
The Libertarian Institute
How Obama Made War Cool Again
Eric Schuler, The Daily Face Palm