Alexander Vindman, the one-time National Security Council (NSC) aide whose testimony before Congress fueled the first impeachment of President Donald Trump, on Tuesday announced he's launching a Democratic Senate campaign in Trump's adopted home state of Florida.Vindman, a retired Army lieutenant colonel, is aiming to challenge GOP Sen. Ashley Moody, who was appointed last year by Florida Gov. Ron DeSantis to fill the Senate seat left vacant when then-Sen. Marco Rubio stepped down to serve as Secretary of State in Trump's second administration.Republicans are defending their 53-47 Senate major...

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