The Senate Intelligence Committee has not uncovered any direct evidence of a conspiracy between the Trump 2016 presidential campaign and Russia, NBC News is reporting.

This comes after two years of investigation by the panel.

However, investigators do not agree about a pattern of contacts they have detailed between Trump associates and Russians. The disagreement is split between party lines about contacts that occurred, before, during and after Russian operatives were seeking to help Donald Trump by leaking hacked Democratic emails and attacking Hillary Clinton on social media, the network news reported.

"If we write a report based upon the facts that we have, then we don't have anything that would suggest there was collusion by the Trump campaign and Russia," Sen. Richard Burr, R-N.C., chairman of the intelligence panel has told CBS News. "I don't think we've got any rock that we haven't turned over, regardless of, geographically, where it's located."

But Democratic investigators told NBC News Burr’s comments lack context.

"We were never going to find a contract signed in blood saying, 'Hey Vlad, we're going to collude,'" one Democratic aide said.

And the Democrats maintain the contacts, between Trump associations, campaign officials, his children and various Russians imply a campaign willing to accept help.