UPDATE 1-Contenders, picks for key jobs in Trump's administration

(Adds Trump names Mattis for Pentagon, Manchin and Cohn

mentioned for energy secretary, Hamm no longer for energy,

interior)

Dec 1 (Reuters) - U.S. President-elect Donald Trump said on

Thursday he would nominate retired Marine Corps General James

Mattis for defense secretary, the latest of about a dozen picks

he has announced for high-level positions since winning the Nov.

8 presidential election.

Below are people mentioned as contenders for senior roles as

Trump works to form his adm

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