The biggest problem between Turkey and the US is the purchase of S-400 systems by Ankara.

Axar.az reports citing "Kommersant" newspaper.

"Trump talked more sincerely and didn`t hide his admiration for Erdogan," he said. However, such talks do not contribute to the solution of Turkey-US problems. Trump does not have time to think about these problems right now. The United States has focused on domestic issues, especially impeachment, "the article said.

Note that during his visit to the United States, Erdogan met with his US counterpart Donald Trump to discuss topical issues.