The Wong Kim Ark ruling doesn't apply to Obama. Obama's father was never permanently domiciled in the U.S. Gray specifically states that birth in the U.S. to parents permanently domiciled in the U.S. is one of the agreed upon facts on which he ruled.
Judges have consistently applied US v. Wong Kim Ark to Obama’s eligibility and their rulings have not been overturned by higher courts. No court has ever ruled that US v. Wong Kim Ark does not apply to Obama.
For example: Ankeny v Daniels, Indiana A three judge panel of the Indiana Court of Appeals ruled unanimously: “Based on the language of Article II, Section 1, Clause 4 and the guidance provided by Wong Kim Ark, we conclude that persons born within the United States are ‘natural born citizens’ for Article II, Section 1 purposes, regardless of the citizenship of their parents.”—Indiana Court of Appeals, November 12, 2009
http://www.in.gov/judiciary/opinions/pdf/11120903.ebb.pdf
And:
Voeltz v Obama, Judge John C. Cooper, Leon County, Florida Circuit Court Judge: “In addition, to the extent that the complaint alleges that President Obama is not a “natural born citizen” even though born in the United States, the Court is in agreement with other courts that have considered this issue, namely, that persons born within the borders of the United States are “natural born citizens” for Article II, Section 1 purposes, regardless of the citizenship of their parents.”—September 6, 2012
http://judicial.clerk.leon.fl.us/image_orders.asp?caseid=77182640&jiscaseid=&defseq=&chargeseq=&dktid=57485906&dktsource=CRTV
And:
Tisdale v Obama, US District Court Judge John A. Gibney, Jr.: “It is well settled that those born within the United States are natural born citizens.”— Tisdale v Obama, US District Court of the Eastern District of Virginia, January 23, 2012.
http://www.scribd.com/doc/82011399/Tisdale-v-Obama-EDVA-3-12-cv-00036-Doc-2-ORDER-23-Jan-2012