The signatures are part of that letter. So is this:
With this in mind, we, the undersigned Eagle Forum state leaders, enthusiastically endorse Ted Cruz for President of the United States. From the grassroots up, we will work to ensure his victory: Ted Cruz is our choice, and we refuse to be an echo.
How do we know those attempting to take over are Cruz supporters...
We can see that they are by dint of having their names listed in that press release.
Ergo, they're Cruz supporters.
CA....