Seems to me that “herein granted” means the legislative powers that are described in the constitution and nothing else.
If it isn’t described, then the Congress and Senate can not legislate it... thus why a constitutional amendment had to be added to eliminate alcoholic beverages, the congress could not ban it. States could, but not Congress.
Worked for a while, until they discovered the good & plenty clause, and the interstate commerce clause and stretched them to infinity and beyond.
There is something else.
"Herein granted" is a thought meant to be extended by the implied [by We the People... who ordained and established this Constitution].
We would then be expected to believe that We the People, in order to "secure the Blessings of Liberty to ourselves and our Posterity," meant to grant transient visitors to the United States the power to create citizens on their own.
The people of any nation have the right to choose who can join their nation. If they do not have the right to control their own citizenry, then they are at risk of invasion from outsiders.
There are two ways to join the nation: be the Posterity of its citizens, or become naturalized by laws passed by the representatives of the citizenry in Congress.
People who are not citizens of this country who birth children in this country take away the right of the citizens of this country to control who may become it's citizens. It is a de facto invasion from within by foreigners to take over the country without the consent of its native citizens.
-PJ