well, if hubby is related to DJT and HilLIARy, that means DJT is related to HiLIARY
which is not an especially reassuring sign?
Not really. It is far back, different branches. Hillary and President Trump are only related in my husband’a dna, not to each other. Hillary’a looks iffy, but the President’s line to Scotland looks good. My two sets of grandparents are not related to each other.
Not necessarily, unless you count in-laws as relatives.
My brother is not related to my wife's brother. My brother's children and grandchildren are not related to my brother-in-law's children and grandchildren. But my children and grandchildren are related to all of them, because they share common ancestors. My kids and my brother's kids share two of the same grandparents (my parents) and my kids and my brother-in-law's kids share two of the same grandparents (my wife's parents).