Q&A: Kamala Harris' hidden foe—pervasive bias against powerful middle-aged women

In the span of a few short weeks, Kamala Harris has burst from the shadows of the U.S. vice presidency to the role of joyful warrior running for the most powerful political position on Earth. But even as she prepares to take on former Republican President Donald Trump, Harris is confronting another, almost invisible opponent: a pervasive, deep-seated bias against middle-aged women who rise to power.