"It is necessary to disarm to a thread": why to United States of America declared possible loss of interest of allies to the military helps to Ukraine

Preservation of military support Ukraine in the future can become "the real call" for the western countries, the deputy assistant President of the United States on national safety Jonathan Fayner declared. Now, according to him, doubts in this question it is not observed: The West tries "to react to requirements Kiev", including providing it artillery. However in Ukraine do not consider given help sufficient and are afraid that "fatigue" of foreign partners from the current situation can push Kiev to the unprofitable agreement for it. Meanwhile experts do not exclude that the European society sooner or later...