Politician in obvious statement of political idiocy (8)

I believe the answer is:

trumpism

'political idiocy' is the definition.
(as in Donald Trump)

'politician in obvious statement' is the wordplay.
'politician' becomes 'MP' (Member of Parliament).
'in' is an insertion indicator.
'obvious statement' becomes 'truism' (a truism is an obviously true statement).
'mp' going inside 'truism' is 'TRUMPISM'.

'of' acts as a link.

I've seen this clue in The Guardian.

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