WASHINGTON – President-elect Joe Biden already faces the daunting task of steering a newly announced $1.9 trillion coronavirus relief bill through a closely divided Congress as the pandemic and its economic fallout grow.Now Biden will have to do it with President Donald Trump’s impeachment trial beginning potentially as soon as his first day in office.The confluence of events amounts to one of the most politically and logistically complicated openings to a new administration in modern history, requiring Biden to try to move the country into a post-Trump era even as senators debate Trump's most divisive acts. “It’s going to be incredibly challenging,” said former Arkansas Sen.