The US president says he's "disappointed", after Ukraine's President Volodymyr Zelensky expressed surprise his country was not invited to Tuesday's talks in Saudi Arabia.

Among the veteran diplomats and national security advisers gathering for top-level talks between the U.S. and Russia, Harvard-educated Kirill Dmitriev cut a distinct figure this week. As Moscow seeks to match the Washington team’s dealmaking lineup,

U.S. and Russian officials met on Tuesday in Riyadh for the highest-level talks to date between the two former Cold War foes on ending the war in Ukraine. They were expected to discuss ways to end the three-year-old conflict in Ukraine and restore American-Russian relations.

U.S.-Russia relations have gone from nowhere to close engagement in a week, since Donald Trump called Vladimir Putin ahead of a putative summit.

Russian President Vladimir Putin and U.S. President Donald Trump could meet as early as this month, although a face-to-face meeting will take time to prepare, Kremlin spokesman Dmitry Peskov said on Wednesday,

Rachel Maddow assembles a collection of clips showing Donald Trump's strangely spooked reaction to questions about his contacts with Russian President Vladimir Putin, and ponders the political fallout for Trump as he realigns the United States against traditional friends and forges new ties with Russia,

Fox News senior White House correspondent Peter Doocy has the latest on President Donald Trump's world diplomacy on 'Special Report.'