There’s something strange about the controversy surrounding Barack Obama’s recent visit to Cuba: It’s largely revolved around whether the Castro government deserved restored relations with the United States and a visit from the U.S. president. [...] If diplomacy is three-dimensional, the political debate in America over U.S.-Cuban affairs has been occurring on only one plane.

Sen. Ted Cruz’s bill to forbid an Iranian diplomat from entering the U.S. got President Barack Obama’s signature Friday, though the president noted he still considers the law “advisory.” The law spearheaded by the typically polarizing Texas Republican was a rare moment of consensus in D.C.: Obama’s sign-off follows unanimous passage in the Senate and House last week.