Question for media: When have GOP attacks on Pelosi ever led to electoral success?

There's an odd assumption among many political reporters that Republican attacks on Nancy Pelosi are some sort of silver bullet in the GOP's campaign attack arsenal. Time's Jay Newton-Small, for example, writes today:

In 1994, the GOP had Gingrich, an outsize personality whose Contract with America manifesto gave congressional Republicans a simple and accessible platform around which to rally voter discontent. This time, there's no clear-cut, dynamic leader to spearhead the charge and challenge Obama the way Gingrich challenged Clinton. On the other hand, in 1994 no one knew who Democratic House Speaker Tom Foley and Democratic Senate majority leader George Mitchell were. These days, the faces of Nancy Pelosi and Harry Reid are plastered all over GOP attack ads.

But Republicans have been attacking Nancy Pelosi for three election cycles now, with little evidence it has ever helped them win a single campaign. Yet again and again, the media assume it'll work this time, apparently forgetting the last time Republicans made a show of attacking Pelosi. And the time before that. And the time before that ...

Maybe it will work this time. But shouldn't reporters be a little more skeptical after all those failures?

(And just for the record: Despite Newton-Small's suggestion that the “Contract with America” was a key to the GOP's 1994 victory, it was rolled out just a few weeks before election day and had very little to do with the GOP's gains that year. Yes, 1994 -- not, as the Tea Party Patriots would have it, the 1980s. You'd think a group backed by Dick Armey's FreedomWorks would know that ...)