Intelligence official says Russia and China are lining up on opposite sides of the U.S. election

A top intelligence official says Russia is using a "range of measures" to take down former Vice President Joe Biden ahead of the 2020 presidential election, while China prefers that President Trump doesn't win.

William Evanina, director of the National Counterintelligence and Security Center, released a statement on Friday detailing the "intentions and activities" of U.S. adversaries in the presidential election, which describes how intelligence officials are "concerned" primarily about China, Russia, and Iran.

By the U.S. assessment, China "prefers that President Trump — whom Beijing sees as unpredictable — does not win re-election," Evanina wrote. Additionally, Russia is "using a range of measures to primarily denigrate" Biden, and "some Kremlin-linked actors are also seeking to boost President Trump's candidacy on social media and Russian television," the statement said.

Finally, Evanina said that Iran seeks to "undermine U.S. democratic institutions, President Trump, and to divide the country in advance of the 2020 elections," driven by its belief that Trump being re-elected would "result in a continuation of U.S. pressure."

Senate Intelligence Committee Acting Chair Marco Rubio (R-Fla.) and Vice Chair Mark Warner (D-Va.) on Friday said this statement "highlights some of the serious and ongoing threats to our election." They also said that additional information has been provided to members of Congress in recent weeks and that more of it "can, and at the appropriate time should, be shared with the voting public."