The momentum behind a misleading narrative

… The notion that Romney still had “momentum” weeks after his early October gains in the polls has now been debunked by numerous commentators and academics.

And while that pushback is increasingly reflected in campaign-trail accounts, it is worth taking a closer look at why coverage of Romney’s “momentum” went wrong and what it tells us about the weaknesses of campaign journalism. [cont.]

Brendan Nyhan, Dartmouth (Columbia Journalism Review)