Donald Trump in tweet says considering effort to save Trump Plaza and Taj Mahal

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Real estate mogul and reality TV star Donald Trump on Tuesday took to social media to say he's considering buying back into bankrupt casinos Trump Plaza and Trump Taj Mahal.

Trump Plaza shut its doors at 6 a.m. Tuesday.

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The casino at the center of the Boardwalk and the end of the Atlantic City Expressway has been declining for years, performing worse than any of the city's other casinos.

It joins the Atlantic Club, the Showboat and Revel, each of which hasclosed this year.

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By CNBC. The Associated Press contributed to this report.