President Donald Trump used a primetime address to the nation on Thursday to announce the declassification of intelligence documents that he said prove Chinese interference in the 2020 US presidential election, once again raising questions about election security despite previous US intelligence assessments that found no evidence Beijing changed the outcome of the vote. The 25-minute speech highlighted Trump’s effort to make election integrity a major political issue ahead of the November midterm elections, when Republicans will attempt to defend their majorities in Congress.

Several major networks opted not to carry the speech, amid concerns he could make misleading claims about the U.S. elections system.

Some Trump officials worried the information could be misleading, sources said.