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.

President Trump welcomed Ukrainian President Volodymyr Zelensky to the White House on Monday, fresh off a summit with Vladimir Putin in Alaska. Why it matters: Trump came out of the summit with Putin declaring that it was now "up to President Zelensky" to make a deal.