When Birthers fantasize about what would happen if Obama were removed from office, they tend to ultimately put Senator Robert Byrd in the Oval Office. Joe Biden is deemed ineligible because he was elected as Obama's running-mate, and Nancy Pelosi is deemed ineligible due to some pseudo-legalistic arguments surrounding her signature on Obama's qualification form.
Curiously, in the seventeen months since Obama took office, I've never yet seen a Birther ask or answer what I should think would be a top priority for them: is Nancy Pelosi a "natural born citizen"?
After all, Birthers can talk a blue streak about why Obama's dual citizenship at birth or his father's citizenship makes him Constitutionally ineligible under their fabricated definitional scheme, but no one ever applies that to Speaker Pelosi.
The reason that is so curious is because, like Obama, Nancy Pelosi is the daughter of an immigrant. Her mother, Annunciata M. Lombardi, was born in Italy in 1909, and immigrated to the United States as a child.
Pelosi's paternal grandfather was also an Italian immigrant, and thus like Tom Tancredo, Pelosi may possess Italian citizenship.
Now I've checked, and in the 1930 census, Pelosi's mother is listed as a naturalized citizen. But I had to research that myself; Pelosi's mother's origins are publicly known, but no Birther has ever expended any effort to learn when or whether Annunciata naturalized. Birthers did not subject Pelosi to their "natural born citizen" standard and, after historical research, find her satisfactory; no, instead they've never bothered to check at all.
And thus, Birthers accidentally betray the truth. The reason they have never checked the citizenship of Nancy Pelosi's parents is because the citizenship of Nancy Pelosi's parents doesn't matter. Not Constitutionally, at least. And neither does the citizenship of Barack Obama's parents, or of any President's parents for the past two centuries. That's why prior to 2008, even the Birthers themselves never concerned themselves with the citizenship of the parents of Presidential candidates. Birthers have created an imaginary definition that they say disqualifies Obama, but they can't manage to employ it consistently even now.