Looking at the registration card and assuming its true. In this day and age, really who the hell knows, right? But assuming its true, first thing I would say is: Well, I guess Jeff Bezos doesn't like her proposed wealth tax! But aside from that, the registration card actually bolsters Warren's story. Her story is that she had always been told that she had Native American blood. In this context, when nobody was looking and when she had nothing to gain by making the assertion (she could have left it blank of course), she self identified as Native American. Of course a subsequent DNA test showed dilution of course, but even the fact she took the test and released such a diluted result tends to indicate that its more likely than not that she labored under a misapprehension about her own ethnicity.