Vice President Mike Pence said he’d take a lie detector test “in a heartbeat” to prove he wasn’t the senior White House official who penned an anonymous op-ed for The New York Times that was heavily critical of President Donald Trump.

And, on Monday’s broadcast of “The Late Show,” he kept his word.

Sort of.

Via some clever video editing, host Stephen Colbert appeared to wire Pence up to a truth-discovering machine and grill him over possible Trump campaign collusion with Russia and journalist Bob Woodward’s new tell-all book, Fear: Trump in the White House.

Find out how Pence fared in the comedy clip below: