"I haven't seen a significant decrease in their activity," Pompeo told the BBC of the Russians.
"I have every expectation that they will continue to try and do that, but I'm confident that America will be able to have a free and fair election (and) that we will push back in a way that is sufficiently robust that the impact they have on our election won't be great," he said.
That effort included hacking and releasing emails and documents from the Clinton campaign and filling social media with posts and "news" items aimed at discrediting her.
Trump has repeatedly dismissed the idea that Moscow helped him -- and allegations his campaign colluded with the Russians -- as fake news.
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Pompeo, whom Trump appointed to the US spy agency, has deftly avoided that controversy while emphasising he accepts the conclusions of his predecessor.
In the elections, minority Democrats will be battling to try and prise control of the two houses from Trump's Republicans.