Dec 2 (Reuters) - U.S. President-elect Donald Trump said

on Monday a series of tax incentives and tariffs will make U.S.

Steel strong again, as he reiterated his opposition to

Nippon Steel's ( NISTF ) planned purchase of the company.

"I am totally against the once great and powerful U.S. Steel

being bought by a foreign company, in this case Nippon Steel ( NISTF ) of

Japan," Trump wrote on his social-media platform Truth Social.

"I will block this deal from happening. Buyer Beware!!!"