After US President Trump released a signal on July 7 that the F-35 stealth fighter may be sold to Turkey, no substantial progress has been made on related plans for more than a month. According to news from the US side on August 13, Turkey's equipment with a Russian-made S-400 air defense system is one of the obstacles to arms sales. Some members of the US Congress believe that Turkey can only acquire F-35 fighter jets if it abandons this system. US Senator Rick Scott said that Turkey “cannot obtain an F-35 fighter as long as it still has the S-400 system.” Furthermore, the Israeli side also publicly opposed this arms sale.

After US President Trump released a signal on July 7 that the F-35 stealth fighter may be sold to Turkey, no substantial progress has been made on related plans for more than a month. According to news from the US side on August 13, Turkey's equipment with a Russian-made S-400 air defense system is one of the obstacles to arms sales. Some members of the US Congress believe that Turkey can only acquire F-35 fighter jets if it abandons this system. US Senator Rick Scott said that Turkey “cannot obtain an F-35 fighter as long as it still has the S-400 system.” Furthermore, the Israeli side also publicly opposed this arms sale.