Speaking at a meeting with Slovakian Prime Minister Mikulas Dzurinda Bush said the United States and Europe were "on the same page on this issue."
"Hopefully we'll be able to find a diplomatic solution," he said.
The leaders of Britain, France and Germany, who are negotiating to get Iran to abandon uranium enrichment, have "all said loud and clear that the Iranians should not have any nuclear weapons," said the US leader, who is on the last day of a visit to Europe.