1. interactiveThe Upshot
    Obama’s Health Law: Who Was Helped Most

    A new data set provides a clearer picture of which people gained health insurance under the Affordable Care Act.

  2. Baseball's Best
    Madison Bumgarner, Sandy Koufax and Christy Mathewson

    The Upshot’s Matty Score ranks Bumgarner as one of the three best World Series pitchers.

  3. Midterm Calculus
    Why Polls Tend to Undercount Democrats
    Peter Gamlen

    A crucial problem is that pollsters, for a variety of reasons, are more successful at reaching Republican-leaning voters.

  4. Monetary Policy
    The Fed Has Not Stopped Trying to Stimulate the Economy

    For all the fuss about the decision to end quantitative easing, the Federal Reserve is far from any kind of monetary tightening.

  5. Monetary Policy
    Quantitative Easing Is Ending. Here’s What It Did, in Charts.

    The program has slowly helped the economy recover, but it has had many side effects, including making lots of people on Wall Street wealthy.

  6. Campaign Finance
    Outside Spending Shows How Few of the House Races Are Competitive

    Twenty-five contests account for 80 percent of all reported outside spending for House elections.

  7. Tracking Turnout
    The Big Role of Black Churches in Two Senate Races

    In Georgia and North Carolina this past Sunday, blacks cast 53 percent of the votes.

  8. A Study in Controversy
    Professors’ Research Project Stirs Political Outrage in Montana

    Sending mailers to voters was intended to test how information about the ideology of candidates affected officially nonpartisan races.

  9. Midterm Calculus
    Senate Model Update: What if Georgia Goes to a Runoff?

    A runoff election there is looking like a very real prospect, and a runoff is nothing like a regular election.

  10. The New Health Care
    A Formula to Find the Uninsured Around the Country

    Enroll America began with a huge phone survey of 12,000 adults and added neighborhood data.

  11. Midterm Calculus
    Mark Udall Faces a Turnout Challenge in Colorado

    Although the example of Michael Bennet’s unlikely election in 2010 looms large in this race, the two situations are quite different.

  12. Midterm Calculus
    Latest Alaska Polls Show Surprising Shift Toward Mark Begich

    The chances for the incumbent senator to hang on to his seat suddenly look brighter.

  13. Degrees of Education
    A New Push to Get Low-Income Students Through College

    Michael Bloomberg’s charity announced an effort to reduce the number of poor students who excel in high school and fail to get through college.

  14. Baseball's Best
    The Greatest World Series Pitchers

    We calculate a new index — the Matty Score — to rank the top pitchers in World Series history. Madison Bumgarner joins Christy Mathewson, Sandy Koufax and others.

  15. A Big Deal
    A $90 Million Condo Flip Shows What’s Wrong With Financial Capitalism

    The purchase of one of the most costly apartments in New York for speculative purposes is a good example of a deal that does nothing for the economy.

  16. Public Health
    AIDS Activists Oppose Cuomo on Ebola Quarantines

    Gov. Andrew Cuomo has been hailed as a leader on H.I.V. prevention, but many of his allies on that issue are upset about his handling of Ebola.

  17. The New Health Care
    What to Look for in Judging the Affordable Care Act

    Getting answers on how to grade the health act will take time, but here are the right questions.

  18. Midterm Calculus
    The Reason the Georgia Race Has Become a Dead Heat

    Michelle Nunn has caught up to David Perdue in polling, and her gains can be attributed to changes in the racial composition of likely voters.

  19. Name Recognition
    How I Learned to Stop Worrying and Love Campaign Ads

    Political ads on TV, though much loathed, actually do the job of improving awareness of who is running for or holding office.