Senate Foreign Relations Committee Chairman Bob Corker (R-Tenn.) says he has “no idea” what Russian Ambassador to the United States Anatoly Antonov meant when he said Wednesday that Trump and Putin had entered into “important verbal agreements.”

Corker expressed concern about talk that the White House and Kremlin are “setting up a second meeting so they can begin implementation” of these mystery agreements.

Other Republicans pointed to the lack of transparency as problematic.

“I don’t know what happened privately, nobody does,” said Sen. Rob Portman (Ohio), adding that Trump needs to publicize whatever efforts he made to push back against Putin in their private meeting.