John Oliver has a deep, dark secret—he may be to blame for Donald Trump’s presidential candidacy, he says.

During the months leading up to the election, Oliver has made it clear that he is not a fan of the Republican presidential nominee. Oliver has devoted a great deal of screen time to Trump (or as Oliver calls him, Drumpf) targeting his brand of sarcasm and encouraging him to drop out of the race. This entire time, though, Oliver has been hiding a secret buried deep in his past.

On Sunday night’s episode of Last Week Tonight, Oliver finally came clean and admitted his role in Trump’s current run for the U.S. presidency. Turns out that back in 2013, Oliver filled in as a guest host on The Daily Show and rather explicitly called on Trump to run for president. “Do it,” Oliver told Trump back in 2013, adding: “I will personally write you a campaign check now.”

That’s right, Oliver encouraged the man he now calls “the human equivalent of a clear plastic bag filled with cheeseburgers and Confederate flag belt buckles” to run for president. As Oliver said, “In my defense, I have no defense for that.”

Watch the full clip below.

Get The Brief. Sign up to receive the top stories you need to know right now. Please enter a valid email address. Sign Up Now Check the box if you do not wish to receive promotional offers via email from TIME. You can unsubscribe at any time. By signing up you are agreeing to our Terms of Use and Privacy Policy . This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Thank you! For your security, we've sent a confirmation email to the address you entered. Click the link to confirm your subscription and begin receiving our newsletters. If you don't get the confirmation within 10 minutes, please check your spam folder.

Contact us at letters@time.com.