From my new Upshot column (co-authored with Kyle Dropp):

America’s most prominent birther has finally disavowed the myth he helped to create. Will Donald J. Trump’s concession affect the public’s belief about whether President Obama was born in the United States?

Results from a new Morning Consult poll of registered voters suggest that fewer Americans now believe that President Obama was born outside the country — the false claim that Mr. Trump renounced last Friday — although birtherism continues to linger among a subset of the public.