US President Joe Biden has tested positive for Covid-19 and is suffering mild symptoms, the White House said on Wednesday evening. Biden is “vaccinated and boosted and he is experiencing mild symptoms,” White House Press Secretary Karine Jean-Pierre said in a statement. The positive test came as Biden, who is seeking re-election in November, was campaigning in Nevada. He met with supporters at a Mexican restaurant in Las Vegas earlier on Wednesday but was forced to cancel a planned speech at a conference hosted by UnidosUS, a Latino civil rights organization. Nevada is one of a small handful o…