Posted by Nicholas Beaudrot of Electoral Math

I promised everyone a rationale for my pollyannish but ill-received claim that Democrats will gain seats if a clear majority votes for a Democratic Congressman. So break out your quill pens, your carbon paper, and your abacus, and we’ll take a look at recent congressional results.

Ezra Klein is a former Prospect writer and current editor-in-chief at Vox. His work has appeared in the LA Times, The Guardian, The Washington Monthly, The New Republic, Slate, and The Columbia Journalism Review. He’s been a commentator on MSNBC, CNN, NPR, and more.