(CNN) Of course it's come to this.

Sen. Elizabeth Warren, D-Massachusetts, dogged by questions about her family ancestry, has been forced (by President Donald Trump) to take a DNA test, a test that reveals she very likely has Native American ancestry , six to 10 generations back.

Case closed! Well, not really.

Remember when President Barack Obama, dogged by questions about whether he was an American citizen, was forced (by citizen Donald Trump) to release his long-form birth certificate? And how after that Trump still clung to the birther lie, for years?

Expect the same with Warren.