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Democratic Congressman Alan Grayson announced a run for the Florida Senate seat that Republican Marco Rubio is giving up to run for president.
Close friend and major Democratic Party donor John Morgan said Wednesday that Grayson told him he is running for Senate.
Grayson is known for his brash, unapologetic criticism of Republicans. While he is popular with the progressive wing of the Democratic Party, some party leaders are concerned he's too politically divisive to win a general election.
He is challenging U.S. Rep. Patrick Murphy in the primary. Murphy is a former Republican and moderate who has already received the support of many party leaders.
Republican Congressman Ron DeSantis is also running with other GOP candidates expected to get in the race soon.