Video report by ITV News Correspondent Duncan Golestani
US intelligence has accused Russia of acting covertly to boost Donald Trump in the election race, according to US media reports.
Those targeted are believed to include Hillary Clinton's campaign chief and others in a bid to harm her chances of becoming president.
President Obama has ordered a review into the alleged email hacking, a White House official said.
Mr Obama has raised his concerns about Russia's involvement directly with President Vladimir Putin.
Many Democrats believe disclosures in emails stolen from Democratic Party officials benefitted Republican Donald Trump - something Mr Trump disputes.
Democratic senators have asked Mr Obama to declassify more information about Russia's alleged role in the hacks.
Intelligence and national security officials have been told to report their findings to President Obama before he leaves office on 20 January.
President-elect Trump said he is not convinced Russia was behind thecyber attacks.
His transition team said it was "time to move on" and Mr Obama's review into the alleged hacking was brushed off at Trump Towers.
Russian officials have denied all accusations of interference in the election.