"We're basically talking about origins and destinations in Europe coming from the United States. And that's where the areas of overlap are. And since they're already in alliance, I can imagine the European Union wasn't as concerned about those issues."
Bush used to work in the anti-trust section of the Department of Justice that reviews mergers like this one. He says the DOJ will be concerned more than the Europeans were about the overlap between the two carriers in their hub cities.
"Also concerned about people who are not living in hub cities trying to get reasonable connections at reasonable fares. And the fewer competitors you have, the greater chances you're going to face what anti-trust enforcers call 'monopoly power'".
Both Continental and United say they will continue to work cooperatively with the Department of Justice in completing the merger, which the two companies hope to close sometime in the fourth quarter of the year.