“They are changing the methods by which their State Legislatures appoint their Electors for President and Vice President.
It is perfectly legal and perfectly Constitutional.”
I believe you are mistaken as you are mixing up TWO separate initiatives. The first is choosing electors based off of popular vote which may be constitutional other than the fact that it is entering into a “compact” which would be unconstitutional. This is in a grey area and would likely end up in SCOTUS.
This article concerns the out and out elimination of Trump from the ballot which is blatantly unconstitutional as they have no authority to deny any candidate for Federal office that has met Federal criteria to be included.
Correction:
“The first is choosing electors based off of (NATIONAL) popular vote.”
Included in what? There are no Presidential elections in the Constitution.