"And after while, you forget, who's the senator?"
Scott didn't attend the rally but joined the president earlier at a roundtable event.
Trump said Nelson wants to raise taxes, supports sanctuary cities, and opposed "Kate's Law", which would have increased criminal penalties for repeat illegal immigrants who committed violent crimes.
Polling suggests that DeSantis has overcome Agriculture Commissioner Adam Putnam's once-commanding lead, due nearly exclusively to the president's endorsement.
Trump supporters are a critical constituency DeSantis is counting on in his primary contest with Adam Putnam.
He spent much of the rally highlight strong economic numbers and praising DeSantis as "a tough, brilliant cookie". The act aims to increase the quality of technical education.
Trump will be speaking at a rally at the Florida State Fairgrounds in support of Ron DeSantis for Governor.
Scott was in Washington on Tuesday and was scheduled to travel with Trump on Air Force One to Tampa.
Voter ID required to stop Democrats' push for non-citizens to vote
"If Trump's for him, we're for him", said Iris Bernard, a 47-year-old Pinellas County resident, about DeSantis, a three-term congressman representing northeast Florida.
The song mixed with the taunts from people in cars and a man screaming into a loudspeaker about Jesus. The group's members are independent food retailers, family-owned or privately held, both large and small.
Trump has complained to confidants that the Kochs "never respected" him and "refused to get on board" his electoral movement, according to a person familiar with his views but not authorized to discuss private conversations.
His comment follows an announcement that the political network created by billionaire industrialists Charles and David Koch would not help the Republican candidate in North Dakota's Senate race.
Responding to Trump's social media attack, Koch spokesman James Davis was measured.
Republican Jose Oliva, the next speaker of the Florida House who hails from Miami Lakes, spoke before Trump took the stage.
Ivanka Trump introduced her father as someone "who keeps his promise and who will always deliver for America's workers". "Two nice guys with bad ideas".
The president headlined a rally for DeSantis at Tampa's Florida State Fairgrounds with four weeks to go before the August 28 Republican gubernatorial primary, in which the congressman will face off against state Agricultural Commissioner Adam Putnam.
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