hed seen fit to endorse and support the NRA-backed Concealed Carry Reciprocity Act.
He does endorse and support it. Why do you say he doesnt?
There have been several stories stating that Trump does not back coupling of the Concealed Carry Reciprocity Act with John Cornyn's background check bill, like
this one and
this one. Trump is not saying that he's against the idea of reciprocity for concealed carry, or that he won't back such a bill in the future - but he apparently doesn't think it's got a chance currently.
I know that. People have been extrapolating Trump saying not o put Concealed Carry Reciprocity in John Cornyn’s background check bill into “Trump doesn’t support Concealed Carry Reciprocity”.
Doing that is a lie of omission.