A bipartisan group of 58 former senior national security officials issued a statement Monday saying that “there is no factual basis” for President Trump’s proclamation of a national emergency to build a wall on the U.S.-Mexico border.

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.

WASHINGTON — American intelligence officials are increasingly convinced that Crown Prince Mohammed bin Salman of Saudi Arabia is culpable in the killing of the dissident journalist Jamal Khashoggi, an appraisal that poses challenges to a White House intent on maintaining a close relationship with the kingdom.

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.