Why the surge of women candidates may not change the Capitol

The N.Y. Times' Kate Zernike and Denise Lu explain why this year's 476 female House candidates have a tough road ahead.

The issue: "More than half the female candidates for House and Senate seats are challenging incumbents, who historically almost always win; there were far more wide-open races in 1992’s so-called Year of the Woman, which doubled the number of women in Congress."