Fayetteville (United States) (AFP) – Few voted for him, but he has plunged American politics into uncertainty: Libertarian Party candidate Chase Oliver won just enough votes in his Senate election race to force a runoff that could shape the rest of Joe Biden’s presidency. Oliver grabbed some two percent or 81,000 votes in Georgia’s Senate poll at Tuesday’s midterm elections — enough to prevent his more powerful rivals, Democrat Raphael Warnock and Republican Herschel Walker, from taking the seat outright. Now that sliver of support for Oliver, a 37-year-old Star Trek fan who ran his campaign …