Warren was stupid for going down that route, as it could only backfire on her (as it did).
A much better strategy would have been to start to label Trump as a Neanderthal, based on him having Neanderthal DNA – and making that reference as much as possible.
The hope would be that Trump will want to deny it, which could then be leveraged into demanding that he take a genetic test.
For this strategy to have maximum impact, the accusations should be made and popularized by politicians of Japanese or Pacific Islander ancestry (neither of which carry the Neanderthal gene), so they can go ahead and take the test and show “zero Neanderthal”, egging Trump on.
(Note: ALL Caucasians and Europeans have between 3%-5% Neanderthal DNA.)