A diplomatic scramble unfolded Saturday after President Donald Trump announced he would meet his Russian counterpart, Vladimir Putin, next week in Alaska, as European leaders rushed to understand the terms of the meeting and ensure Ukraine was not being left out of discussions about its future.

The White House has not ruled out the possibility of Ukrainian President Volodymyr Zelensky joining President Donald Tru

A meeting between Trump and Putin is tentatively scheduled for the end of next week, a senior White House official told NBC News.