Transcript for Russian woman arrested in alleged plot to meddle with midterms

And another developing story. This one also involving the midterm elections. President trump responding to this as authorities say the Russians are at it again. Pierre Thomas on the breaking headline tonight. Reporter: Tonight, for the first time, an alleged Russian operative has been indicted on charges of meddling in the upcoming midterm elections. The FBI says 44-year-old Elena khusyanova is part of an ongoing Russian conspiracy to "To spread distrust towards candidates for U.S. Political office, and the U.S. Political system," and to "sow division and discord." Much of the activity involves social media posts like this targeting hot-button issues in the U.S. Gun rights, immigration, the NFL national anthem debate, and race relations, specifically tensions erupting from the 2017 charlottesville protests. The Russian posed as Americans and had thousands of followers on social media. President trump suggesting the impact was minimal. I didn't have anything to do with my campaign. All the hackers and everybody you see, had nothing to do with me. If they're hackers, they probably like Hillary Clinton more than me. Now they do, now they do, but they go after some hacker in Russia, that had nothing to do with my campaign. Pierre, federal prosecutors say this Russian woman charged is part of a wider conspiracy? Reporter: Prosecutors say she's part of the same group that targeted the 2016 elections. She remains in Russia, with little chance she is brought here. David? Thank you.

This transcript has been automatically generated and may not be 100% accurate.