Helsinki summit a chance for Trump to press Putin on non-interference

The backdrop: Trump has made border protection the cornerstone of his domestic policy and has been raising it more often with foreign leaders as well. Last month, he criticized Germany for allowing in refugees rather than enforcing border controls and, in a call with Hungarian Prime Minister Viktor Orbán, discussed the "importance of border protection and agreed that a country that cannot defend its own borders is no longer a country."

Putin enjoys reminding others that sovereignty is at the core of his worldview. He has used “sovereignty protection” as justification for intervening in Syria on behalf of Bashar al-Assad, committing to defend Syria’s “territorial integrity” even in the face of Assad's chemical weapons attacks on his own people and the subsequent U.S.–led coalition bombing of Syrian positions.

The Russian president has also used the principle of non-interference in other countries’ domestic affairs to justify expelling Western non-governmental organizations from Russia and suppressing Russian independent media by labeling them as foreign agents. It is this same supposed commitment to the sovereignty principle that Putin uses to deny Russian meddling in foreign elections.

Alina Polyakova is the David M. Rubenstein Fellow for Foreign Policy at the Brookings Institution.