President Obama nominated Army Gen. Martin Dempsey on Monday as his pick to be the next chairman of the Joint Chiefs of Staff, replacing Navy Adm. Mike Mullen, whose term ends Sept. 30.

Dempsey, an accomplished veteran of the Iraq war and the current Army chief of staff who’s only been in his post for one month, will need Senate confirmation.

The president also named Adm. James Winnefeld, the commander of Northern Command, to be his vice chairman of the Joint Chiefs, replacing Marine Gen. James Cartwright. While not a household name, sources describe him as a smart officer, who is well-known at the White House. One source described him as “Mullen’s guy.”

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