'We are in a competition of values with unfree nations,' US secretary of state says in Germany, cites Western 'responsibility to deter threats' from such governments

Russian leader defends conduct of US president amid impeachment probe, jokes that Moscow will 'absolutely' meddle in 2020 US elections

Washington targets Russian financier Yevgeny Prigozhin, whose company was charged with using fake social media accounts to spread disinformation ahead of US elections

Treasury targets assets of Russian financier Yevgeny Prigozhin, whose company was charged with using fake social media accounts to spread disinformation ahead of 2016 elections

Russia also downplays reports that a top aide to Putin was an American spy; Pompeo calls news 'materially inaccurate' and warns of danger to security of country

US announced Monday it had tested a ground-launched nuclear-capable cruise missile previously banned under 1987 treaty with Soviets that expired earlier this month

Russian president warns of 'dangerous consequences' and 'chaos' that could ensue if powers don't engage in 'serious dialogue'

Washington accuses Moscow of 'sustained and repeated' violations of nuclear treaty after withdrawing from agreement

But alliance chief also places blame for demise of INF treaty on Moscow, expresses support for Washington

US president meets Russian counterpart for first time since release of Mueller report, says 'there's absolutely no time pressure' to ease tensions with Iran