MSNBC.com says:

"Kerry makes campaign official

MOUNT PLEASANT, S.C., Sept. 2 — John Kerry, maintaining the country should reject President Bush’s “new vision of government,” is officially declaring his candidacy for the Democratic presidential nomination."

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“IN CHALLENGING TIMES we need leadership that knows how to make America safer, that knows how to put America back to work,” Kerry said Tuesday in remarks prepared for his official entry into the race. “The president has misled America and he has made our path more difficult as a result.”