"Human Events" editor Jack Posobiec, from the "New Media Seat" at today's White House briefing, asked for details on what role the U.S. would play in a reported "Article Five-like" security guarantee for Ukraine in the event of a ceasefire.

Ukrainian and European leaders are likely to push back hard on Russia’s demands, but risk casting themselves – in the eyes of the White House, at least – as obstacles to peace.