US Agriculture Secretary Johanns resigns

WASHINGTON, Sep 20 (Reuters) US Agriculture Secretary Mike Johanns resigned today after nearly three years in office, clearing the way to run for the US Senate in Nebraska, where he was a popular two-term governor.

President George W Bush announced the decision of Johanns, who became the latest in a series of senior officials to depart the administration including Attorney General Alberto Gonzales and Bush's longtime political adviser Karl Rove.

''I am writing to inform you that I have decided to pursue a new opportunity to serve this great nation,'' Johanns said in a letter to Bush.

Johanns was expected to announce his candidacy as early as Monday for the seat being vacated by two-term Sen Chuck Hagel, a Republican. Analysts say he could be the front-runner among Republican candidates.

Also running are state Attorney General Jon Bruning, former Omaha mayor Hal Daub and a financial advisor, Pat Flynn.

Democrats have talked of recruiting Bob Kerrey, a former senator and Nebraska governor who is now a university president in New York City.

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