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US President Joe Biden has accused congressional Republicans of "attacking him with lies" after they voted to launch an impeachment inquiry.

The House of Representatives passed the inquiry, which means an impeachment vote could take place early next year.

The impeachment will give House Republicans much stronger powers to subpoena witnesses and gain access to evidence.

The Republican-controlled chamber voted 221-212 along party lines to approve the probe, which is examining whether Biden improperly benefited from his 53-year-old son Hunter Biden's foreign business dealings.

The White House has dismissed the inquiry as unsubstantiated by facts and politically motivated.