Amelia Warren Tyagi is the co-author of two best-selling books about middle-class economics, but she never gets top billing. The California business executive and sometimes commentator for the nationally syndicated radio show “Marketplace” is better known as “the daughter of Elizabeth Warren.” It’s rare for Tyagi to upstage her media-savvy mother, now a Democratic Senate candidate. But last week, the daughter was in an uncomfortable spotlight when US Senator Scott Brown accused her of meddling in a voter registration matter to benefit Warren’s campaign.
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