The word 'dynastic' in political perspective means
UNBROKEN.
I do not see any apparent blood relations between Obama and the others, do you?
US sticks to its old school governance and refuses to change, is that what you mean "unborken", Chinese systems change fast with the time, that's why you see our governance is totally different from what it was decades ago but US remains the same, so "unbroken"
I do not see any apparent blood relations between Obama and the others, do you?
.
You can learn a lot by checking
Genealogical relationships of Presidents of the United States
Direct descent
The
United States Presidents who are related to each other by direct descent are:
Two other pairs of Presidents have shared a surname.
Andrew Johnson and
Lyndon Johnson have no known relationship.
Theodore Roosevelt and
Eleanor Roosevelt (
née Roosevelt), who was Theodore's niece.
Indirect relatives
This is a list of some of the closer blood relations, other than direct descent, between U.S. Presidents. (See
James Madison and
Zachary Taylor
Third cousins
Fourth cousins
Fifth cousins
Sixth cousins
Seventh cousins
Eighth cousins
Ninth cousins
Tenth cousins
Other relationships
The list above includes the closer, more significant relationships. Family trees, particularly those in a limited geographic area, tend to converge relatively rapidly and many family trees going back ten generations or more will connect to more than one dozen U.S. Presidents, if all female ancestors and their descendants are traced. This is why, for example,
Richard Nixonwas the father-in-law of
George Washington's half aunt married
James Madison's half great-uncle.
Woodrow Wilson married (as his second wife) the great-great-great-niece of
Thomas Jefferson.
Presidents related to royalty
Presidents related to British royalty
As a result, all of the listed people are direct descendants of
Alfred the Great. All but one of them are also descended from
William the Conqueror with the exception of
Rutherford Hayes. Most of these royal ancestors were born before the
Black Death killed much of the population of Britain in 1349.
In addition, according to
Genealogics and
Roglo, HM Queen Elizabeth II is among the closest living relatives of George Washington, through their descent from Augustus Warner, Burgess of Virginia.
Presidents related to other royalty
https://familypedia.wikia.org/wiki/Genealogical_relationships_of_Presidents_of_the_United_States