President Joe Biden marked a year since the Covid-19 pandemic swept across the country with his first prime-time address — a speech in which he mixed hard numbers on vaccine distribution with appeals to unity and a deep-seated belief in the power of America to overcome any challenge.President Joe Biden marked a year since the Covid-19 pandemic swept across the country with his first prime-time address — a speech in which he mixed hard numbers on vaccine distribution with appeals to unity and a deep-seated belief in the power of America to overcome any challenge.