Sen. John Cornyn John CornynThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Liberal super PAC launches ads targeting vulnerable GOP senators over SCOTUS fight Senate GOP faces pivotal moment on pick for Supreme Court MORE (R-Texas) said Saturday that fresh reports of Russian interference in the U.S. election are “hardly news.”

“All this ‘news’ of Russian hacking: it has been going on for years. Serious, but hardly news,” Cornyn wrote on Twitter.

All this "news" of Russian hacking: it has been going on for years. Serious, but hardly news — JohnCornyn (@JohnCornyn) December 10, 2016

The senator followed up on the tweet, citing a book by former CIA director, retired Gen. Michael Hayden.

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“A good source on this is Michael Hayden's book: Playing to the Edge, American Intelligence in the Age of Terror,” Cornyn added.

Cornyn also appeared to support a tweet from Sen. Lindsey Graham Lindsey Olin GrahamSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (R) in which the South Carolina lawmaker said he would “look at all things Russia,” including the cyberattacks.

On Friday, The Washington Post reported that a secret assessment conducted by the CIA found that Russian operatives meddled in the election to help Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE.

The New York Times also reported Friday that Russian-backed hackers breached the Republican National Committee in addition to the Democratic National Committee, but only released documents from the DNC.

The Trump campaign dismissed the reports late Friday.