Ukraine’s future could hinge on a hastily assembled meeting Monday at the White House as Ukrainian President Volodymyr Zelenskyy brings an extraordinary cadre of European leaders with him to show U.S. President Donald Trump a united front against Russia .
The European political heavy-hitters were left out of Trump’s summit with Russian President Vladimir Putin last Friday in Alaska, and they're looking to safeguard Ukraine and the continent from any widening aggression from Moscow.