In August 2013, according to experts the Russian-American relations have reached their lowest point since the end of the Cold War era. The September President Barack Obama's visit to Moscow and his talks with Putin were canceled due to temporary asylum in Russia, a former employee of the CIA Edward Snowden, disagreements on the situation in Syria and the problems with human rights in Russia. Russia has a long history of Anti-Americanism, dating back to the early days of the Cold War. In some of the latest Russian population polls, the United States and its allies consistently top the list of greatest enemies. Survey results published by the Levada-Center indicate that, as of August 2018, Russians increasingly viewed the United States positively following the Russia–U.S. summit in Helsinki in July 2018. But only 14% of Russians expressed net approval of Donald Trump's policies in 2019. According to the Pew Research Center, "57% of Russians ages 18 to 29 see the U.S. favorably, compared with only 15% of Russians ages 50 and older."