The United States has completely dominated the Presidents Cup. The 2011 win at Royal Melbourne was their seventh; against only one loss and one draw. The main reason for their success is the competition they face.
The International Team does not have the talent to match the USA. That does not explain everything as the Ryder Cup results have shown.
The International Team lacks the camaraderie that the United States or Europe has. They are not representing an international tour out to prove its merit. Those are two big factors in Europe's Ryder Cup success.
The International Squad has seen its superstars emerge in a widely staggered time frame. The European squads seem to produce top level talent within a short period.
The lack of depth hurt the international team in singles competition. The foursomes and four-ball teams have been hurt by increasing the number of players who compete.
Here are the five reasons why the USA has dominated the Presidents Cup.