(CNN) The Senate Intelligence Committee's leaders said Wednesday they believed that the intelligence community's 2017 assessment of election meddling was correct, breaking with Republicans on the House Intelligence Committee who questioned the conclusion that the Russians were trying to help President Donald Trump get elected.

"There is no doubt that Russia undertook an unprecedented effort to interfere with our 2016 election," Senate Intelligence Chairman Richard Burr, a North Carolina Republican, said in a statement. "Committee staff have spent 14 months reviewing the sources, tradecraft, and analytic work, and we see no reason to dispute the conclusions."

The top Democrat on the committee, Sen. Mark Warner of Virginia, said that "after a thorough review, our staff concluded that the ICA conclusions were accurate and on point. The Russian effort was extensive, sophisticated and ordered by President Putin himself for the purpose of helping Donald Trump and hurting Hilary Clinton."

The joint statement comes after former director of the National Security Agency Michael Rogers, former CIA Director John Brennan and former Director of National Intelligence James Clapper sat down with the committee in a closed hearing Wednesday morning about the 2017 assessment.

The bipartisan conclusion from the Senate Intelligence Committee leaders is a sharp break from Republicans on the House Intelligence Committee, who disputed the intelligence community's findings that Russian President Vladimir Putin was trying to help Trump.

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