“I have no hard evidence of collusion,” Mr. Coons told “Fox News Sunday.”

He said he was sorry for any misinterpretation of his comments, which blew up on social media after a Friday interview on MSNBC.

“So to the extent of those comments, they might be in some way misinterpreted as leading to sort of a hyperventilating attitude here in the Senate about this, I apologize for that,” Mr. Coons said. “That’s not what I was trying to do.”

At the same time, he said, “I am confident that intelligence exists that is relevant to this question. Not that says there is collusion, and proof of it, that’s not what I was trying to say.”