Not strictly Dr Jill but Jill Biden (EdD) Only M.D. and PhD acquire the esteem to prefix with Dr.
Astute, however, Jill only has a doctorate in education which is abbriviated as EdD
If she acquires a PhD, then she is "allowed" to use the Dr. legitimately. (You) need to Educate yourself.
I know (You) will not accept this as the correct answer but, it's up to (You) to decide to remain ignorant or accept the education that has been presented to you.
That is all.
Precisely. Other anons haven't understood that whilst the person may have earned a doctorate, that alone doesn't entitle them to use the prefix Dr! That is reserved for PhD and Medical Doctors; specifically in the USA. There are some exceptions in the EU and Britain. They are essentially the same or more stringent.