The spending deal agreed upon by House and Senate negotiators includes $425 million for states to improve their election security, two congressional source confirmed to The Hill on Monday.

According to the sources, the appropriations deal, set to be made public later Monday, will also include a requirement for states to match 20 percent of the federal funds, meaning the eventual amount given to election officials to improve election security would reach $510 million.

The federal funds set to be given to states through the Election Assistance Commission (EAC) represent a compromise between the amounts separately offered by the House and Senate earlier this year for election security purposes.

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The House included $600 million for election security efforts in its version of the fiscal 2020 Financial Services and General Government Bill, which the chamber passed earlier this year.

In the Senate, the Appropriations Committee included $250 million for election security in its version of the same bill, an amount that had bipartisan support and was backed by Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellHawley warns Schumer to steer clear of Catholic-based criticisms of Barrett Senate GOP set to vote on Trump's Supreme Court pick before election Harris slams Trump's Supreme Court pick as an attempt to 'destroy the Affordable Care Act' MORE (R-Ky.).

The two chambers disagreed, however, over how the funds could be used, with the House requiring states to use the money for specific election security improvements such as replacing equipment and the Senate allowing a broader use of the funds.

One of the congressional sources told The Hill that the funding deal used the language in the Senate version, which requires the money to be used "for activities to improve the administration of elections for federal office, including to enhance election technology and make election security improvements."

Congress previously appropriated $380 million to the EAC to give out to states to improve election security in 2018.

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EAC Chairwoman Christy McCormick told the Senate Rules Committee during testimony in May that about 29 percent of the funds had been spent by states as of April 30, and that the EAC expected around 85 percent of the funds to be used prior to the 2020 elections. States have until the end of fiscal year 2023 to use the funds designated to them in 2018.

State and local election officials have repeatedly begged Congress to give them more funding to address election security concerns, particularly in the lead-up to the 2020 elections.

Election security has been a major issue on Capitol Hill over the past few years, particularly after Russia interfered in the 2016 presidential election.

U.S. intelligence agencies, former special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE and the Senate Intelligence Committee all concluded that Russia carried out a sweeping and systematic attack on the 2016 election involving hacking and disinformation operations.