Clarence William Nelson

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Florida Democratic gubernatorial candidate Andrew Gillum, left, greets Sen. Bill Nelson, D-Fla. before speaking to supporters at a Democratic Party rally Friday, Aug. 31, 2018, in Orlando, Fla. (AP Photo/John Raoux)

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"If [Sen. Bill Nelson] does have classified information, how did he get it? I don't think he's entitled to it, and why would he release it to a reporter?" asked Florida Gov. Rick Scott (right), a Republican. (Associated Press Photographs)

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Sen. Bill Nelson, a Democrat, was quoted saying that "Russians are in Florida's election records," and that they had "already penetrated certain counties in the state and have free rein to move about."

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This year, Sen. Bill Nelson, Florida Democrat, faces his toughest challenge yet. He'll run against Gov. Rick Scott, which sent Mr. Nelson scrambling to nationalize the race. (ASSOCIATED PRESS)

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FILE - In this Thursday, Nov. 20, 2014, file photo, Senate Commerce Committee member Sen. Bill Nelson, D-Fla., displays the parts and function of a defective airbag made by Takata of Japan that has been linked to multiple deaths and injuries in cars driven in the United States, during the committee's hearing on Capitol Hill in Washington. Despite thousands of mailed notices and warnings of grave danger, since June 2016, Honda is still struggling to fix 300,000 cars with super-dangerous Takata air bag inflators inside their steering wheels. Nelson says Honda should do more. “No responsible automaker should be so slow in repairing defective vehicles where there’s up to a 50 percent chance a driver could be killed or seriously injured if an air bag deploys,” he said in a statement. (AP Photo/J. Scott Applewhite, File)

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Sen. Bill Nelson, Florida Democrat, is hammering out a legislative proposal to authorize U.S. military strikes on Islamic State targets within Syria. (associated press)

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Sen. Bill Nelson, D-Fla. and game show host Wink Martindale (Trivial Pursuit).

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SpaceX Communications Director John Taylor, right, helps Sen. Bill Nelson (D-Fla.) out of the SpaceX Dragon spacecraft as SpaceX CEO and Chief Designer Elon Musk introduces the companies next generation spacecraft at an event held at the Newseum, Washington, D.C., Tuesday, June 10, 2014. (Andrew Harnik/The Washington Times)

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Senate Intelligence Committee member Sen. Bill Nelson, D-Fla., speaks with reporters on Capitol Hill in Washington, Friday, Nov. 16, 2012 following the committee's closed-door hearing where former CIA Director David Petraeus testified on the Sept. 11, 2012 attack in Libya. (AP Photo/Cliff Owen)

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Sen. Bill Nelson (D-Florida) arrives for a closed door Senate Select Committee on Intelligence hearing to discuss the September 11, 2012 attack on the U.S. Consulate in Benghazi, Libya, and the intelligence and security situation in other Arab Spring countries at the Hart Senate Office Building, Washington, D.C., Thursday, November 15, 2012. (Andrew Harnik/The Washington Times)

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U.S. Sen. Bill Nelson, D-Fla., right, hugs a member of his campaign staff after he was declared the projected winner in his senate race, Tuesday, Nov. 6, 2012, in Orlando, Fla. (AP Photo/John Raoux)

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Connie Mack III, right, introduces his son U.S. Rep. Connie Mack IV, center, during a watch party in Bonita Springs, Fla. Tuesday, Nov. 6, 2012. Mack conceded the Senate race to incumbent Bill Nelson. Nelson won even though he was up against a sitting congressman whose father once held the Senate seat _ and whose great-grandfather was a baseball Hall of Famer. (AP Photo/J Pat Carter)