Hillary Clinton says in a text message to supporters that she’s picked Virginia Sen. Tim Kaine to join her on the Democratic ticket as their party’s nominee for vice president.

In the message, Clinton says: “I’m thrilled to tell you this first: I’ve chosen Sen. Tim Kaine as my running mate.”

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Kaine is expected to join Clinton at a rally in Florida on Saturday.

A favorite since the start of Clinton’s search for a running mate, Kaine is a former governor of the battleground state and former mayor of Richmond.

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Kaine won election to the Senate four years ago after serving as the chairman of the Democratic National Committee.

Clinton is choosing Kaine from a group that included Agriculture Secretary Tom Vilsack and Massachusetts Sen. Elizabeth Warren.

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