Federal investigators and computer scientists continue to examine whether there was a computer server connection between the Trump Organization and a Russian bank, sources close to the investigation tell CNN.
Questions about the possible connection were widely dismissed four months ago. But the FBI's investigation remains open, the sources said, and is in the hands of the FBI's counterintelligence team -- the same one looking into Russia's suspected interference in the 2016 election.
One U.S. official said investigators find the server relationship "odd" and are not ignoring it. But the official said there is still more work for the FBI to do. Investigators have not yet determined whether a connection would be significant.
The server issue surfaced again this weekend, mentioned in a Breitbart article that, according to a White House official, sparked President Trump's series of tweets accusing investigators of tapping his phone.
CNN is told there was no Foreign Intelligence Surveillance Act warrant on the server.
The FBI declined to comment. The White House did not respond to a request for comment.
In addition, companies involved have provided CNN with new explanations that at times conflict with each other and still don't fully explain what happened.
You can read the rest at CNN.