"Totally made up facts by sleazebag political operatives, both Democrats and Republicans - FAKE NEWS! Russia says nothing exists," Trump said in a series of posts on Twitter.
"Probably released by 'Intelligence' even knowing there is no proof, and never will be," he said, Reuters reported.
On Wednesday, US spy chief James Clapper said that media leaks of the material had not come from US intelligence agencies and that the agencies had not judged whether the information was reliable.