A day after a Fox News released a poll showing him trailing Adam Putnam by 15 points in the race for the Republican nomination for governor, Ron DeSantis received a boost from President Donald Trump on Twitter Friday.

“Congressman Ron DeSantis, a top student at Yale and Harvard Law school, is running for Governor of the Great State of Florida,” Trump posted on Twitter Friday morning. “Ron is strong on Borders, tough on Crime & big on Cutting Taxes – Loves our Military & our Vets. He will be a Great Governor & has my full Endorsement!”

Congressman Ron DeSantis, a top student at Yale and Harvard Law School, is running for Governor of the Great State of Florida. Ron is strong on Borders, tough on Crime & big on Cutting Taxes – Loves our Military & our Vets. He will be a Great Governor & has my full Endorsement!

— Donald J. Trump (@realDonaldTrump) June 22, 2018

The president’s tweet was welcomed news to the DeSantis campaign, which sent out a releass saying Trump reinforced “his full endorsement of Candidate for Governor, Congressman Ron DeSantis.”

“We’re proud to have the full support of President Trump,” said campaign spokesman David Vasquez. “As a top conservative leader in Florida, taxpayer superhero and an Iraq veteran, Ron DeSantis will make a Great Governor of Florida.”

DeSantis was one of the three Republicans who were endorsed by Trump Friday morning. The president also tweeted support for Martha Roby of Alabama and Henry McMaster of South Carolina.

It was a tweet by Trump back in December saying DeSantis “would make a GREAT Governor of Florida” that eventually led to DeSantis entering the race weeks later.

Congressman Ron DeSantis is a brilliant young leader, Yale and then Harvard Law, who would make a GREAT Governor of Florida. He loves our Country and is a true FIGHTER!

— Donald J. Trump (@realDonaldTrump) December 22, 2017

In the Fox News poll released Thursday, Putnam received the support of 32 percent of the Republicans surveyed, while DeSantis received 17 percent. Over half of those surveyed said they were undecided (39%) or preferred another candidate or none of those in the race (12%).

The poll also showed that 46 percent of those surveyed who currently support a candidate say they could still change their minds.

Putnam and DeSantis will face-off against each other on Thursday, June 28, in a primary debate hosted by Fox News at the Gaylord Palms Resort & Convention Center in Orlando.