The legal case against Rick Perry continues to underwhelm. The TPM headline is alarming; whatever one thinks of the merits of the case against Perry obviously threatening the grand jury is out of bounds, and Perry is powerful enough that he needs to take extra care to not appear to be doing that. But the alleged threat appears to be based on the following Perry statement:
I am confident we will ultimately prevail, that this farce of a prosecution will be revealed for what it is, and that those responsible will be held to account
This is boilerplate rhetoric for a battling indicted politician. The prosecution is specifically mentioned in the previous paragraph; I can’t see how a good faith reading of this statement could plausibly interpret it as directed to members of the grand jury.