White House officials have for months delayed the release of a U.S. government report that outlines what it describes as significant vulnerabilities in the nation’s voting machines ahead of the November midterms, according to three sources familiar with the matter.

The report, produced by the Office of the Director of National Intelligence, concludes that voting ‌machines could be further safeguarded by, for example, updating their software, the sources said. It does not say the vulnerabilities have led to votes flipping, but examines security gaps in how the machines are used during U.S. elections.

Some White House officials have argued the report could undermine voter confidence, particularly among Republicans. Others have said they do not believe the report goes far enough in supporting Donald Trump’s false claims that the 2020 presidential election was rigged, the three sources said. Some Democrats said privately they worried Gabbard’s probe into voting machines would be used by the administration to push states to use paper ballots.