Excellent observation. You seem to be quite right. The Secretary of Agriculture for the state of Texas, having seen that the federal government was looking into messing around with health care, attempted to influence the process to guard the state's constituent's in Texas. The letter is a typical official state letter to a federal official, reminding them that there are real people in real states that they might impact, and that they need to take that into consideration.
Now people are acting like Perry was the Governor of Texas in 1993, and set policy for the state, and that this letter was a campaign activity and not an official letter from a state official looking out for his constituents.
Fortunately, most people aren't buying the spin. So much so that opponents have to make up arguments for their opponents that are easier to knock down than the actual arguments.
Perry should have been on the front lines fighting Hillary, not kissing up to her.