Americas top TV networks plan to issue an open letter asking for President Joe Biden and Donald Trump to participate in a televised election debate‚ according to two sources with direct knowledge who spoke to The New York Times.The Times obtained a draft version of a letter endorsed by ABC‚ CBS‚ CNN‚ NBC and Fox News‚ which reads‚ We‚ the undersigned national news organizations‚ urge the presumptive presidential nominees to publicly commit to participating in general election debates...