Democratic Vice Presidential candidate Tim Kaine is on the defensive, after he suggested that WikiLeaks is manipulating the content of Hillary Clinton campaign emails to cause discord in the election.

“If you’re trying to influence an election at the end, why would we assume any of it is true?” he asked reporters on Thursday, suggesting that the group was “tinkering with the content” or that the email was “manipulated.”

When asked by NBC’s Kailani Koenig to name an example of the WikiLeaks organization manipulating the emails, he suddenly appeared confused.

“There was, I actually read of one example yesterday, but actually I’m reading too many stories and I can’t pin down which one it was,” he replied. “Somebody saying, ‘I don’t think I ever sent that.’”

Afterwards, WikiLeaks taunted Kaine on Twitter.