BERLIN, May 28 — The Obama administration’s push to resettle at least 50 Guantanamo Bay prisoners in Europe is meeting fresh resistance as European officials demand that the United States first give asylum to some inmates before they will do the same.

Rising opposition in the U.S. Congress to allowing Guantanamo prisoners on American soil has not gone over well in Europe. Officials from countries that previously indicated they were willing to accept inmates now say it may be politically impossible for them to do so if the United States does not reciprocate.