Learn English – Word, phrase or idiom for an action taken for solely political advantage

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Is there a word, phrase or idiom for an action taken for solely political advantage (although superficially this might be non-obvious)?

Example:

What evidence is there that Lyndon Johnson's War on Poverty was more
than a [political action for his advantage, although superficially a
poverty reduction programme].

Best Answer

You could consider using "political gimmick". "Gimmick" means:

A trick or device intended to attract attention, publicity, or trade: 'it is not so much a programme to improve services as a gimmick to gain votes'

[Oxford Online Dictionary]

What evidence is there that Lyndon Johnson's War on Poverty was more than a "political gimmick"?