Republican Senator Joni Ernst
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US mid-terms: The winners and losers

The Republicans have won control of the Senate in the US mid-term elections, increasing their power in the final two years of Barack Obama's presidency.

The party won in Arkansas, Colorado, Georgia, Iowa, Montana, North Carolina, South Dakota and West Virginia.

It is expected to post more gains as votes are counted in other states.

Winners and losers have been giving their reactions to the results.

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