 This is 1A. I'm Jen White. First Lady Jill Biden is turning out to be a key figure in her husband's presidential re-election campaign. Political spouses are unelected but hold a unique political power. We're discussing the evolving role of our country's first ladies with Katie Rogers, the White House correspondent at the New York Times. She's also author of the new book, American Woman, the transformation of the modern first lady from Hillary Clinton to Jill Biden.