What I fail to understand is:
1) Why did he take such a test?
2) Why does he talk about it?
Which other president took such a test and talked about it? By doing this, he actually acknowledges the doubt cast on his mental status.
I suggest some trolls allege he has syphilis. Perhaps he will get tested and then talk about not having syphilis (unless he has). This will make people think: "Why did he need to get that test?".
Hans
No that was his Vietnam and he managed to dodge a bullet.