States rights.
Yes, and no.
Article III, Section 2, Clause 1 includes the following:
The judicial Power shall extend to all Cases, in Law and Equity, arising under this Constitution, the Laws of the United States, and Treaties made, or which shall be made, under their Authority;... to Controversies to which the United States shall be a Party,
The Supreme Court, sadly, has taken a broad view of that clause to include the establishment of districts. Texas will be lucky if the Court upholds their redistricting. If the Court blocks it, people in other heavily gerrymandered states (like CA, MA, IL, NY) will have precedence to sue to have them overturned. I doubt that process would be complete in time for the midterms.
Also, to be pedantic for a moment, states have powers. People have rights.
Pedant away! Just using a common phrase. I am very tired of "progressive" judges re- interpreting the will of the people, writ large.