In terms of Trump, let me just say that not all menstrual blood is unclean.
First of all  there are five shades of red that are unclean and five that are clean.--And in spite of what you may think--these are possible to verify. And that is strict דין תורה--the law of the Bible.
When the question of blood comes up nowadays, what happens id  that any shade of red or black is considered unclean. But that is not because of the Torah. That is because people are too lazy to find out example what wavelengths constitute unclean and which ones constitute clean blood.

Another astounding fact is that nowadays there is almost never any kind of הרגשה [feeling] that the Talmud considers a problem. [Unless there is feeling there is nothing unclean.] I have not made a big deal about this because the Noda BeYehuda did in fact say that the feeling of some liquid moving inside is considered "feeling." So even if the Chatam Sofer and Natan Adler disagreed still I would rather not be the one be lenient in this matter.

In any case the comment of Trump was in no way demeaning unless people specifically want to take it that way. And then they are just being immature.