Greece is the immediate concern, but an a great deal larger problem is what may happen should markets renew attacks about the larger economies of Spain and Italy, he said in a roundtable with Spanish-speaking journalists in Washington.
"It is difficult to co-ordinate and agree a common path if you have so many countries with different policies and economic circumstances, " El Mundo website reported him as telling the briefing.
"In the end the big countries in European countries, the leaders in Europe must meet and take a choice on how to coordinate monetary integration with more efficient co-ordinated fiscal policy. "
US Treasury Secretary Timothy Geithner is a result of make a one-day trip to Poland this week to satisfy with euro zone finance ministers as fears grow which Greece will soon default on its debt.
A long-term solution is possible if markets believe euro zone countries with budget surpluses are prepared to back their partners in the monetary union, Obama stated.
The United States is in consultation with the euro zone over how you can resolve the crisis, Obama said.