If you read the statement, all it says is that Mr. Trump will be making an announcement regarding the Presidential race tomorrow.
NOWHERE does it say that Trump is endorsing Newt; for all we know, he could use his press conference to announce a third-party run, and Trump being Trump, I wouldn’t put it past him.
I purposely posted “the sources say” part in the body of the thread... but my experience has always been local news outlets tend to have good sources... this is a Las Vegas tv news station...