"the list also puts a lot of pressure on rinos in the party he can leverage the list to get them in line"

See, this is EXACTLY what I was thinking. Suppose Trump has the list? Sure, he can release it altogether.

But suppose instead he does backdoor threats to politicians

"Hey Mr. Senator, I know for decades you have openly said illegal immigrants are a problem yet you and your business buddies keep importing them, but how about you now actually support my bill to stop them altogether, otherwise some bad info might get out there"

In other words, if Trump can use this list to leverage MAGA., I am totally fine with him using it as a silent weapon