Michelle Obama's star power could help Biden unite Democrats

WASHINGTON (AP) — Seeking to unite Democrats, Joe Biden has raced to line up supporters ranging from progressive icon Bernie Sanders to former President Barack Obama, whose administration sometimes irked liberals. But the person with the most influence may be Michelle Obama. The former first lady is a unique figure in a deeply polarizing political environment, exceedingly popular with the party faithful while also having some appeal with Republicans and independents. She left the White House with a 68% approval rating, according to Gallup polling. She also was named “the most admired woman” in the world for the second year in a row in a Gallup poll from December. And her memoir, “Becoming,”...