“The S-400 is a huge question ... it is an extremely difficult question, because it concerns the largest investment in defense of the United States and its allies since World War II - the F-35 fighter,” he said.
According to him, the actions of the Turkish side "undermine the potential of this fighter."
“Two sides were stagnant on this issue. This is the biggest problem. Otherwise, Turkey and I get along quite well on most issues, including Libya, NATO, the Caucasus-Black Sea region, Syria and Iraq, ”added Jeffrey.
Previously, the Pentagon stated that Turkey would not receive American Patriot systems until it returned to Russia the purchased S-400.
As noted in Ankara, Turkey is ready to buy Patriot on certain conditions, but at the same time emphasized that the position of the Turkish side on the S-400 has not changed.