Mormon: 72/27 Romney
Christian Orthodox: 68/31 Romney
Protestant: 57/42 Romney
Catholic: 53/46 Obama
Jewish: 66/33 Obama
Buddhist: 79/20 Obama
Hindu: 81/18 Obama
Muslim: 86/13 Obama
Atheist: 87/12 Obama
English Americans: 51/48 Obama
Scottish Americans: 50/49 Obama
Scandinavian Americans:50/49 Romney
Irish Americans: 51/48 Romney
German Americans: 55/44 Romney
Italian Americans: 56/43 Romney
Polish Americans: 59/41 Romney
ALL White Americans: 59/41 Romney
Russian Americans: 66/33 Romney
Ukrainian Americans: 69/30 Romney
Greek Americans: 71/28 Romney
Pakistani Americans: 89/10 Obama
Indian Americans: 80/19 Obama
Chinese Americans: 79/20 Obama
Korean Americans: 74/25 Obama
ALL Asian Americans: 73/26 Obama
Filipino Americans: 54/45 Obama
Vietnamese Americans: 57/42 Romney
Mexican Americans: 79/20 Obama
ALL Hispanic Americans: 72/26
Cuban Americans: 57/42 Obama
African Americans:96/4 Obama
Native Americans: 62/36 Obama
There is no way Obama won the English-American vote. Maybe in New England, but in the Mormon states as well as Deep South they would have gone strongly for Romney. I would also be interested in what the Dutch-American vote was. I am guessing it was 60-65% for Romney.
Also for Italian and Polish-Americans, I have a tough time believing Romney did better amongst them than German-Americans. He may have won them but considering most are in the Great Lakes and Northeast where the white vote was fairly evenly split, I suspect it was a lot closer. For Scandinavian-Americans, I wonder what the breakdown by group was as I suspect the Danish-Americans probably went most heavily for Romney, followed by the Swedish-Americans, while the Norwegian and Finnish-Americans if those numbers are correct probably narrowly favoured Obama.
Most Russian-Americans are Jewish so pretty sure Obama won them and Ukrainian-Americans did not go 2/3 for Romney while Greek-Americans are mostly in large urban centres like Chicago, Boston, New York, and Philadelphia so pretty sure Obama won them too. Portuguese-Americans probably also favoured Obama as well. For Scots-Irish, I suspect that group went over 2/3 for Romney.
As for Cuban-Americans, it was 50-47% in Florida so I think Romney won this group albeit a strong age gap as it looks like Obama solidly won the younger Cuban vote, but the older Cuban vote went heavily for Romney.
As for Native Americans it was probably at least 80% for Obama maybe 90%. If you look at the reserve vote, it was usually over 90% Obama. True some like the Cherokees and Navajo don't vote quite as massively as a block, although I still suspect Obama got over 70% from them. If you include those of mixed Native blood, you may be right as many in the Appalachians and South have a small amount of Native blood and off course they went heavily for Romney.