0 (of a politician) saying things in public that support the official ideas of his or her political party:
The candidate is clearly on message with the party leadership.
1 someone who is on-message says things in public that show they agree with the ideas and decisions of their political party, the government, etc.:
2 saying things in public that show you agree with the ideas and decisions of your political party, the government, etc.:
They hire whichever "on-message" journalists and editors they wish.
They can identify with a punchline gone wrong and celebrate the way in which he stays on message regardless.
Those who stay on message never get on it.
Does it mean that he is not on message?
Perhaps the judges need to be put on message.
Fortunately, there are some medical practitioners and researchers who are not, to use current language, "on message".
There is a grave danger of the top-up system being used to introduce people who are so on message as to be unbelievable.
Some of them were far more on message than most of us candidates.
I presume that that shows they will be on message until they die.