off message
Deviating from or being untrue to the official or agreed upon view, plan, or ideology. We just feel like having a spokesperson with such strong religious convictions is a little off message for our organization. The candidate usually maintains an unflappable demeanor during these interviews, rarely stepping outside of a set of carefully crafted responses, so it was odd to see him going so drastically off message.
on/off ˈmessage
(of a politician) stating/not stating the official point of view of their political party: Despite their internal problems, the party maintains a public front of staying on message. off message
Deviating from a planned set of remarks or positions: The aides worried that the candidate would make a gaffe if he went off message.