Trump took a jab at Warren Buffett for dumping the airlines. It might be payback for Buffett's attacks on his business career.

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· *President Trump called out Warren Buffett for selling his airline investments on Friday, saying the famed investor made a mistake.*
· *Trump likely enjoyed the moment, given Buffett endorsed Hillary Clinton for president in 2016 and tore into Trump's business career ahead of the election.*
· *"I don't know anybody...