Sen. Lindsey Graham Lindsey Olin GrahamSteele Dossier sub-source was subject of FBI counterintelligence probe Hillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Key Democrat opposes GOP Section 230 subpoena for Facebook, Twitter, Google MORE (R-S.C.) said Tuesday he's "honored" to be heading down to Florida with President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE as the president announces his bid for a second term in the White House.

"I'm honored to be flying down to Orlando with President @realDonaldTrump as he announces his 2020 reelection campaign," Graham tweeted.

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"The President has a compelling story to tell. Whether it’s nominating conservative judges, defeating ISIS, or cutting taxes and creating jobs, I look forward to helping share that story and spreading his conservative vision," he added.

The President has a compelling story to tell.



Whether it’s nominating conservative judges, defeating ISIS, or cutting taxes and creating jobs, I look forward to helping share that story and spreading his conservative vision.



Now....On to Victory! #Trump2020 — Lindsey Graham (@LindseyGrahamSC) June 18, 2019

Graham's support for Trump has flip-flopped since Trump announced he was seeking the presidency four years ago. Graham went from being one of Trump's harshest Republican critics to being among his most staunch supporters.

The president is expected to take the stage at the Amway Center in Orlando at 8 p.m. to kick off his 2020 campaign.

Graham is also seeking reelection in 2020. His Democratic challenger Jaime Harrison said he raised $270,000 in 24 hours after announcing his bid in May.