Secretary of State John Kerry said that working with Russia has "presented some challenges" in recent weeks in an interview with Chuck Todd on "Meet the Press."
"Nothing in what we talked about is based on trust," Kerry said in reference to diplomatic efforts with the Kremlin. "I'm not sitting here naively trusting what the Russians may or may not do."
Kerry joined "Meet the Press" from Luxembourg, which was his next stop after being in Moscow to negotiate with Russian leaders on dealing with Syria and determining an international plan to eliminate ISIS.
Kerry also discussed the attempted coup in Turkey and the man Turkish President Tayyip Erdoğan is blaming for the short-lived uprising. Kerry said that at this point he does not have evidence that Fethullah Gulen, who is self-imposed exile in Pennsylvania, is responsible for the unrest there. However, he left the door open to extradition of Gulen if evidence emerges that he was involved.
"According to our extradition treaty, according to our legal process and standards, we will immediately evaluate whether or not that evidence is sufficient to merit an extradition," he said.