Republican US presidential candidate Mitt Romney has chosen Wisconsin representative Paul Ryan as his running partner.
No announcement was expected before the end of the London Olympics, but pundits speculate Romney may have brought the decision forward to bolster his presidential campaign.
Forty-two year old Ryan has served seven terms in Congress and gained national attention as chair of the House Budget Committee.
He is a proponent of budget and spending cuts who is popular with conservatives.
Polls still show incumbent president Barack Obama in the lead, despite the troubled economy.
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