The Democratic and Republican presidential contenders have begun defining their approach to major foreign policy issues as they jockey for position in their parties’ primaries.

The Democratic field could touch on a number of foreign policy issues, from climate change to Iran, during its first prime-time sparring session.

American politics turned hyper toxic several years ago, and ever since commentators have raised the specter of a second civil war. No other historical parallel, it seems, captures so viscerally today…

Many of the supposedly unprecedented features of contemporary politics have familiar echoes in earlier American history, and so the best mirror in which to see our present moment clearly could be our…