What "political purpose" is involved here?
Well, if a state says you're going to be murdered, and the federal government says it's a violation of your Constitutional rights, I guess the argument then becomes "political." And since it's "only political" then no one has a right to do anything, since that would amount to nothing more than "politics." Meanwhile, an innocent person is being killed like a dog in a third-world country.
Due process and equal protection. Congress is charged to ensure that every state comply with the 14th amendment.