Two years ago this week, President Trump signed an executive order banning travelers from a number of Muslim-majority countries from entering the United States. The fallout has been dire.

From sharply rising tensions with a nuclear North Korea and decertification of the Iran nuclear deal to China’s growing global assertiveness and the State Department pullback from projecting American values, such as democracy and human rights, around the world, the United States faces urgent national security challenges.

In a panel discussion Monday evening at Harvard Kennedy School (HKS) moderated by MSNBC host Rachel Maddow, former members of President Obama’s cabinet described what they see as a fraying of alliances, a loss of credibility with allies and enemies, a stepping back as a leader on human rights and democracy, and a relinquishment of diplomacy as a critical component of national security.

The debate in the United States about foreign interference concentrates on who did what to influence last year’s election and the need for democracies to strengthen their cybersecurity for emails, critical infrastructure and voting platforms. But we need to pay far more attention to another vulnerability: our adversaries’ attempts to subvert our democratic processes by aiming falsehoods at ripe subsets of our population — and not only during elections.