President Donald Trump, right, shakes the hand of Russia's President Vladimir Putin, left, during a joint press conference at Joint Base Elmendorf-Richardson, Alaska.

President Donald Trump meets with Russia's President Vladimir Putin at Joint Base Elmendorf-Richardson, Alaska. At left is Russia's Foreign Minister Sergey Lavrov and second from right is Secretary of State Marco Rubio.

President Donald Trump and Russia's President Vladimir Putin speak during a news conference at Joint Base Elmendorf-Richardson, Alaska.

President Donald Trump walks onto a stage with Russia's President Vladimir Putin at Joint Base Elmendorf-Richardson, Alaska. (AP Photo/Julia Demaree Nikhinson)

President Donald Trump waves as he boards Air Force One after meeting with Russia's President Vladimir Putin at Joint Base Elmendorf-Richardson, Alaska.

President Donald Trump greets Russia's President Vladimir Putin at Joint Base Elmendorf-Richardson, Alaska.

The red carpet is cleaned before President Donald Trump steps from Air Force One at Joint Base Elmendorf-Richardson, Alaska, before meeting with Russia's President Vladimir Putin.

Members of the media stand outside Joint Base Elmendorf-Richardson in Anchorage, Alaska ahead of a meeting between President Donald Trump and Russia's President Vladimir Putin.

People attend a rally ahead to the meeting between U.S. President Donald Trump and Russian President Vladimir Putin, during a rally in front of the U.S. Embassy in Kyiv, Ukraine.

Dug Loshbaugh holds a sign during a rally in Anchorage, Alaska ahead of a meeting between President Donald Trump and Russian President Vladimir Putin.

Protesters chant slogans during a rally in Anchorage, Alaska ahead of a meeting between President Donald Trump and Russia's President Vladimir Putin.