The president of Ukraine and his European allies are to visit the White House on Monday, after President Trump backed Russia’s plan to end the war.

It is quite possible that Monday's meeting in the White House could prove even more crucial to the future of Ukraine - and for all of Europe's security - than last Friday's US-Russia summit in Alaska. On the surface, that Putin-Trump reunion seemed to live down to every expectation. There was no ceasefire, no sanctions, no grand announcements.

President Trump said that he and Russia's Vladimir Putin made progress in talks to end the war in Ukraine, but the two leaders did not announce any steps toward reaching a ceasefire.

Lindsey Graham thinks the next phase of American diplomacy over the war in Ukraine needs to target Moscow's pocketbook. "My advice to President Trump and [Secretary of State Marco Rubio] is, you've got to convince Putin that if this war doesn't end justly and honorably with Ukraine making concessions also,