"We have paid a bad price for this progress. This time must be different", he said. Scott's office said he was reviewing the lawsuit.
"Will this bill make a huge investment and dramatically improve school safety, in the hopes of never seeing another tragedy like this again?"
The appropriation includes more than $69 million for mental health assistance in schools, more than $25 million for replacing a building at Marjory Stoneman Douglas and $98 million for hardening security of school buildings.
The bill is less than what many survivors had sought. The answer to all three is yes. "I mean think about it, you have an enumerated right in the Bill of Rights, there's really no precedent to just do a blanket ban on certain adults", DeSantis said on the show.
For some, the legislation marked an important first step toward stricter gun regulations and a vital response to the Parkland community's demand for action.
It also creates a so-called guardian program enabling some teachers and other school employees to carry guns.
Mr Scott said he remained dissatisfied with the guardian provisions as adopted in the Bill, but signed it nonetheless, saying it would enhance school safety overall.
"We had to make a choice".
The US state of Florida faces a federal lawsuit over the gun control law signed by the governor on Friday.
Other provisions of the law include banning the sale or possession of bump fire stocks, giving law enforcement greater power to seize weapons and ammunition from those deemed mentally unfit, and additional funding for armed school resource officers.
Florida is one of the most permissive states in the country for gun purchasers.
Governor Rick Scott, a staunch ally of the gun lobby, defied his longtime allies and enacted the bill, which the NRA says violates the constitution.
"Securing our schools and protecting the constitutional rights of Americans are not mutually exclusive", he said.
Marion Hammer, the NRA's Florida lobbyist, has denounced the bill as an unconstitutional infringement on the Second Amendment and said it passed the state House in "a display of bullying and coercion".
The governor previously said he opposed the new waiting period for guns and any effort to arm teachers. Gun control advocates have argued that the measure did not go far enough.