For any leader, a lingering pandemic that has killed more than a half-million citizens would be plenty for a first 100 days. But it has been far from the sole preoccupation for the 78-year-old Biden.WASHINGTON — The card tucked in President Joe Biden’s right jacket pocket must weigh a ton. You can see the weight of it on his face when he digs it out, squints and ever-so-slowly reads aloud the latest tally of COVID-19 dead.Sometimes he’ll stumble on a digit — after all, flubs come with the man. But the message is always clear: The toll of the virus weighs on him constantly, a millstone that...…For any leader, a lingering pandemic that has killed more than a half-million citizens would be plenty for a first 100 days. But it has been far from the sole preoccupation for the 78-year-old Biden.WASHINGTON — The card tucked in President Joe Biden’s right jacket pocket must weigh a ton. You can see the weight of it on his face when he digs it out, squints and ever-so-slowly reads aloud the latest tally of COVID-19 dead.Sometimes he’ll stumble on a digit — after all, flubs come with the man. But the message is always clear: The toll of the virus weighs on him constantly, a millstone that...WW…