TALLAHASSEE, Fla. (AP) All law enforcement agencies in Florida will have to cooperate with federal immigration authorities under a bill signed by Gov. Ron DeSantis on Friday during a ceremony that often felt like a campaign rally for him and President Donald Trump .

The bill prohibits local governments from enacting sanctuary polices that protect undocumented immigrants from deportation. It will require law enforcement to honor U.S. Immigration and Customs Enforcement detainers for undocumented immigrants who are arrested or convicted of a crime. It exempts crime victims and witnesses.

Sanctuary cities basically create law-free zones where people can come to our state illegally and our country illegally, commit criminal offenses and then just walk right out the door and continue to do it, DeSantis said. In Florida, that will not happen.

The bill was signed in the Okaloosa County Commissions meeting room with an overflow crowd dotted with red Make America Great Again hats. Okaloosa, in the western Panhandle, is one of the states most conservative counties. The crowd cheered wildly in support of the bill, and equally as loud at the mention of Trump.

Trump, who has made illegal immigration a top priority, helped DeSantis win the GOP primary last year and campaigned for DeSantis in the general election. Also speaking at the ceremony was Republican U.S. Rep. Matt Gaetz , another close Trump ally and who campaigned across the state for DeSantis.

DeSantis also introduced Kiyan Michael of Jacksonville, whose son Brandon was struck and killed by a driver who had been deported twice and illegally returned to the country again.

Were blessed to have the best president, we believe, since Ronald Reagan, she said as the crowd roared. Our fight is not over. Our immigration laws have to be reformed, they have to be changed, so you all dont become us.

The bill caused protests among immigrants and their advocates at the Capitol when it was before the Legislature. They feared it would encourage law enforcement profiling, force people to be deported for minor offenses like traffic infractions, and discourage crime victims and witnesses from coming forward. Opponents also argued that holding people based on an immigration detainer was unconstitutional.

Critics said the bill was politically motivated. Republican Sen. Joe Gruters, who also chairs the Republican Party of Florida, sponsored the bill and repeatedly argued it was simply about following the rule of law.

At the bill signing, he said the bill was about making sure we protect American citizens from the very bad, criminal illegal aliens that are here committing the worst crimes imaginable. This is not about illegal aliens who are here trying to provide for their families.