Talks of impeachment against President Biden are being written off as a politically motivated attack. 

The Republican majority House of Representatives voted this week to formally authorise its ongoing impeachment inquiry. 

So far, House Republicans have produced no evidence of Biden's wrongdoing. 

US Correspondent Richard Arnold told Mike Hosking that they might have ulterior motives. 

He suggests the Republicans want an even playing field for next year's election, with a twice impeached Donald Trump running for re-election. 

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