So ends the half-century career of a flawed but resilient politician who won the White House in a razor-thin election and lost it four years later in a debate: Joseph Robinette Biden, Jr. Biden, 81, now eases into a lame-duck presidency for the next six months, as the party he once commanded abandoned him in the span of a few weeks for an as-yet-unnamed candidate to carry the fight against Donald Trump. STAY IN THE KNOW Watch NBC10 Boston news for free, 24/7, wherever you are. Get Boston local news, weather forecasts, lifestyle and entertainment stories to your inbox. Sign...