Polish President Andrzej Duda speaks to CNBC's Steve Sedgwick at the NATO summit in The Hague, giving his take on the need for further defense spending across the alliance.

There are about 10,000 soldiers on our territory. This cooperation is close and permanent,” Duda said. “I will encourage President Trump to have more American units here,” he added.

"There are several thousand American soldiers on our territory all the time, about 10,000. And this cooperation is close, constant and it is getting stronger, so I have no such doubts," Duda said.

In an exclusive interview with Euronews, Polish President Andrzej Duda said that only the United States has the power to stop Russia. ... There are about 10,000 soldiers on our territory.