US President Joe Biden has used a prime-time television address from the Oval Office to urge Americans to shun political violence and come together to protect the nation’s democracy. Speaking a day after an assassination attempt on former President Donald Trump, Biden said that political passions can run high but “competing visions of the campaign should always be resolved peacefully, not through acts of violence.” “The power to change America should always rest in the hands of the people, not in the hands of a would-be assassin,” Biden said. He said passions were running high on both sides an…