By Patrick J. Buchanan

Heeding the advice of Gen. David Petraeus, Barack Obama has committed 17,000 more troops to Afghanistan and will keep 50,000 in Iraq after U.S. combat operations end in August 2010.

But are U.S. vital interests more threatened by what happens in Anbar or Helmand than in the war raging along our southern border?

Prediction: After all U.S. troops in Iraq, Afghanistan and Korea have come home, there will be a U.S. army on the Mexican border. For this is where the fate of our republic will be decided, as the fate of Europe will be decided by the millions streaming north from the Maghreb and Middle East, sub-Sahara and South Asia.