The clip is the latest salvo in the Bush-Trump rivalry, which has often been marked by bitter and personal exchanges between the two prominent Republican presidential candidates. On Friday, Trump suggested Bush’s brother, former President George W. Bush, shared in the blame for the 9/11 terrorist attacks because they occurred during his presidency.

Saturday’s round centered on a video set to the tune of circus music that highlights comments from Trump that have called into question his grasp of military matters. Many of Trump’s most controversial moments are presented, including his questioning of John McCain’s status as a war hero to his inability to name prominent terrorists.