Senior State Department official says US secretary of state was 'among administration officials' on July 25 call; Democrats subpoena Giuliani to turn over Ukraine-related documents

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

New report claims president told Russian FM he was unconcerned about Moscow's interference in 2016 election as US did the same in other countries

US House gives secretary of state 1 week to turn over Ukraine-related documents, announces interviews with state department officials, including former ambassador to Kyiv

Secretary of state says there's 'enormous consensus' among Mideast allies that Iran responsible for dramatic attack on kingdom's oil facilities

US president promises to reveal details on new sanctions against the Islamic Republic within two days

US secretary of state heads to Riyadh as Washington announces 'substantial' new sanctions against Islamic Republic

Crown prince says strike on the heart of the kingdom's oil industry was a 'real test' of global will, urges international community to take a 'firm stance'

US president facing competing urges of keeping up pressure on Tehran to negotiate while deterring any further Iranian attacks and avoiding another Middle East war

Secretary of State to meet with leaders in Riyadh as some in US push for military action against Iran following assault on massive energy facility