My new Bloomberg Opinion column doesn’t try to make sense of what Nancy Pelosi is saying about impeachment: That can’t be done. But it does try to make sense of why she’s saying it. My conclusion: She could inadvertently be undermining the Democrats’ chances of winning the presidency in 2020.

Ramesh Ponnuru is a senior editor for National Review , a columnist for Bloomberg Opinion, a visiting fellow at the American Enterprise Institute, and a senior fellow at the National Review Institute. @rameshponnuru