Over at DanielDrezner.com, guest blogger David Greenberg addresses What's the Matter with Kansas author Tom Frank's seductive contention that Democrats just need to embrace their inner economic populist in order to start winning presidential elections again:

The only problem with this argument is that the Democrats haven’t abandoned their economic populism. This charge has been leveled from the left at every losing Democratic candidate since the 1980s, and it’s just wrong. Economic populism was a key ingredient in the campaigns of Dems from Walter Mondale onward -- incluing John Kerry, scourge of outsourcing. The reality is that economic populism is a necessary but not sufficient element for a Democratic victory.

He's right. Though bread and butter issues are, without question, the Democrats' bread and butter, they're not enough in and of themselves to convince the American people to ignore foreign and national security policy when selecting a commander in chief -- as Matt Yglesias persuasively argued in the March 5 edition of The American Prospect.