Trump advisor Roger Stone had Twitter contact with Guccifer 2.0, hacker tied to Russians

But Mr. Stone insisted in an interview that the contact had been brief and involved nothing more than the exchange of a few direct messages, well after the party committee had been hacked. “Even if he is a Russian agent, my cursory exchange with him happens after he releases the D.N.C. stuff,” Mr. Stone said on Saturday. “There’s only one exchange with him. I had no further exchanges.”

Mr. Stone said the exchange took place after he had published an article on Aug. 5 on the Breitbart News site about the hacking, which the American government has tied to a Russian effort to meddle in the election. After Guccifer 2.0 had been suspended by Twitter, Mr. Stone posted a message against “censorship” and then had what he called an “innocuous” exchange over direct message.

“You would need a time machine in order to collude, and, as I said yesterday, Putin has not yet perfected a time machine,” he said, referring to the Russian president, Vladimir V. Putin.