National-security arguments move deeper into U.S. political disputes

National security has become an increasingly prominent justification in a range of U.S. political and legal disputes. Supporters of a broad executive role argue that presidents need flexibility when security is at stake, while critics warn that stretching the label too far can weaken trust in legitimate security claims.

The issue matters because courts have historically given the executive branch meaningful deference in genuine national-security matters. Where that boundary sits is now becoming part of the political contest itself.