Holyshit.
Again, pay attention. We’re talking about her mom. If Elizabeth Warren’s range is 1/32 - 1/1024, what do you think her mom’s range is?
And why do you refuse to answer the question, who told you no Indian blood was used in her DNA test?
Couple of things. The "match" to particular racial, ethnic groups is not a DIRECT outcome of testing specific DNA from an ancient ancestor. All of those "group associations" that 23&me or others give you is a STATISTICAL estimate of your ULTIMATE ancestry. Thus the very wide range (variance) given in the estimate.
GENERALLY, if it's not 0.4% or HIGHER -- it's "in the noise" and there is NO TELLING what the actual number really is. It's a mere suggestion of possibility at that point. And there is ZERO point in arguing what the ACTUAL number might be.
In fact, to your question about her mother, it doesn't necessarily matter. Because some of the "group" markers may entirely SKIP generations.
The group basis for any ethnic/regional/racial group is ALSO widely subject to variance. Any 2 DNA analysis programs will vary in the numbers assigned. So THIS apparently was a CUSTOM STUDY done at Stanford where they are NOT in the business of collecting and processing literally MILLIONS of samples from around the world. And apparently, the researcher commissioned for this political "dog and pony" show put together his reference data bases of ethnicity, region, race from Ad Hoc stuff available thru academia.
At this point in the business of matching folks to their probably ancestry -- that simply cannot compete with the larger commercial operations for dependability, accuracy. The white coat probably should not have put his name on the report. Because NOW -- his credibility is becoming a political hand grenade tossed by politicians desperate for attention and power.