WASHINGTON (AP) — House Minority Leader Nancy Pelosi wants House Speaker Paul Ryan to not use hacked documents in this year’s election campaigns.

The California Democrat wrote a letter Tuesday to Ryan, a Wisconsin Republican. She said the two parties should unite “in the face of Russia’s attempts to tamper with the will of the America people.”

Federal officials have been investigating electronic break-ins into Democratic Party computers by hackers believed to be linked to Russia. That’s included a breach of the Democratic Congressional Campaign Committee, House Democrats’ campaign arm.

Pelosi wrote that “defending our democracy from Russia’s meddling is more important” than any electoral advantage.

Ryan spokeswoman AshLee Strong steered a reporter seeking comment to the National Republican Congressional Committee. That committee did not immediately respond to a request for comment.