The Iranian military knocked an expensive, state-of-the-art U.S. military drone out of the sky with a surface-to-air missile.

The United States and Mexico are squaring off in a tense showdown entirely of President Trump’s making. Following a tweeted announcement from the president, the Trump administration is readying a 5 percent tariff on $350 billion worth of Mexican goods imported into the United States. Trump threatened the punitive measure as a result of Mexico’s supposed inability to thwart flows of migrants making their way north. U.S. and Mexican officials met in Washington this week to hash out a deal that would dispel the possibility of a new trade war. At the time of writing, there was cautious optimism that the impasse could be breached.

Elad Gil argues that judges too frequently rely on the executive’s special competence in foreign affairs to apply a de facto presumption of near-total deference, which he terms “totemic functionalism.” He traces the conceptual underpinnings of totemic functionalism and, using three case studies, shows how it undermines the American system of checks and balances, first between the organs of government and then, indirectly, inside the executive branch.

In a May 11 speech at the Claremont Institute in Beverly Hills, entitled “A Foreign Policy from the Founding,” U.S. Secretary of State Mike Pompeo quoted John Quincy Adams to explain how Donald Trump’s foreign policy is grounded in a “realism” that eluded his predecessors, particularly George W. Bush and Barack Obama. Adams, then Secretary of State, wrote in 1821 that America “goes not abroad in search of monsters to destroy. She is the well-wisher to the freedom and independence of all.”