A Florida GOP gubernatorial candidate has dropped in the polls after siding with the National Rifle Association (NRA) on a new state law raising the age of purchasing certain guns to 21.

Adam Putnam has said he opposes new gun laws and has made appearances on NRA TV to urge members of the organization to fight back against those fighting for gun control in the wake of a deadly shooting last month at a Parkland, Fla., high school.

“It's more important now than ever for Second Amendment advocates and gun owners to step forward and roll up their sleeves and be involved in the process,” Putnam said.

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Republican consultants told ABC7 that his stance on the issue may hurt his chances of winning the Republican Primary.

Polls showed Putnam with an early lead in the race for the GOP nomination but that lead has disappeared and he is slightly behind his Republican challenger, U.S. Rep. Ron DeSantis Ron DeSantisTrump may meet with potential Supreme Court pick in Miami Florida governor unveils legislation targeting protesters in 'violent or disorderly' demonstrations Names to watch as Trump picks Ginsburg replacement on Supreme Court MORE.

DeSantis now has a slim 2-point lead over Putnam, who is the state’s agriculture commissioner.

Some consultant say the shift in the polls may be in part due to Putnam's collaboration with the NRA, who is suing after current Gov. Rick Scott (R) signed a bill into law raising the minimum age limit to buy a gun to 21.

Young, liberal students told ABC7 they thought Putnam's comments supporting the NRA could be "political suicide."

Voters will head to the polls in the gubernatorial primaries on Aug. 28. Recent polling shows Miami Beach Mayor Philip Levine with a slim lead over former Rep. Gwen Graham Gwendolyn GrahamModerate Democrats now in a race against the clock Dear Iowans: Apologies for Sen. Rick Scott's lack of decency Jimmy Buffett takes musical shots at Trump during concert MORE for the Democratic nomination.

President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE narrowly won the swing state by just 1 point in 2016.