The Fork in the Road Riddle? (EU version)

An international investment banker with Billions in ‘foreign currency’ comes to a ‘fork in the road’ and doesn't know which way to go to reach the place where he has chosen to make his European Union investments.

There are two men at the fork (Herman Achille Van Rompuy & José Manuel Durão Barroso), one of whom always tells the EU truth while the other always tells EU lies.

The investment banker doesn't know which is which, though. He may ask one of the men only one question to find his way.

Which man does he ask, and what is the question?