Republican presidential candidate and former Massachusetts Governor Mitt Romney (L) and his running mate Representative Paul Ryan greet supporters during a campaign rally at the Waukesha County Expo Center on in Wisconsin on Sunday
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Obama verdict on Republican VP candidate Paul Ryan

US President Barack Obama has congratulated the new Republican vice-presidential candidate Paul Ryan, describing his as a "decent" man whose vision is "fundamentally" at odds with his own.

Mr Obama made his first public comments on the selection of Mr Ryan at a campaign fundraiser in Chicago.

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