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Real estate developer Donald Trump says he's not running for Governor of New York.

The billionaire tweeted Friday evening "While I won't be running for Governor of New York State, a race I would have won, I have much bigger plans in mind." Then Trump concludes "stay tuned -- will happen!"

Trump had promised to decide by Friday if he would seek the Republican nomination to run against Democrat Andrew Cuomo this fall. He said this week that GOP Candidate Rob Astorino is a good man, but doesn't have the financial resources to beat Cuomo.