Council on American-Islamic Relations has responded to the designation, calling it an ‘unconstitutional’ and ‘defamatory’ proclamation.

Florida’s governor has designated the Council on American-Islamic Relations (CAIR) a “foreign terrorist organisation”.

Ron DeSantis posted his executive order to list the United States-based Muslim civil rights and advocacy group on social media on Monday.

The move follows a similar declaration by the Republican governor of Texas last month. CAIR has rejected the labelling by both states and mounted legal challenges.

In a separate post, DeSantis asserted that the Florida Legislature is “crafting legislation to stop the creep of Sharia law, and I hope that they codify these protections for Floridians against CAIR and the Muslim Brotherhood in their legislation”.

The designation, which triggers heightened oversight by state law enforcement agencies and establishes financial and operational restrictions, was also declared against the Muslim Brotherhood.

DeSantis’s order asserted that CAIR was “founded by persons connected to the Muslim Brotherhood”, which, without offering evidence, the governor asserted was attempting to establish “a world-wide Islamic caliphate” and has direct links to Hamas.

The order instructs Florida agencies to prevent the two groups and those who have provided them with material support from receiving contracts, employment and funds from a state executive or cabinet agency.

Neither CAIR nor the Muslim Brotherhood is designated as a foreign terrorist organisation by the US government.

However, President Donald Trump has ordered the start of a process to label the branches of the Muslim Brotherhood in Egypt, Lebanon and Jordan as “terrorist” organisations, citing their alleged support for Hamas.

CAIR’s Florida chapter told The Associated Press news agency that it plans to sue DeSantis in response to what it called an “unconstitutional” and “defamatory” proclamation.

The group accused the Florida governor of serving foreign interests and lashing out at CAIR due to its civil rights work.

“From the moment Ron DeSantis took office as Florida governor, he has prioritised serving the Israeli government over serving the people of Florida,” CAIR and its Florida chapter said in a statement.

“He hosted his very first official cabinet meeting in Israel. He diverted millions in Florida taxpayer dollars to the Israeli government’s bonds. He threatened to shut down every Florida college’s Students for Justice in Palestine chapter, only to back off when CAIR sued him in federal court.”

Founded in 1994, CAIR has 25 chapters around the country. Last month, it asked a federal judge to strike down the designation declared against it by Texas Governor Greg Abbott.

In a lawsuit, CAIR said Abbott’s move was “not only contrary to the United States Constitution, but finds no support in any Texas law”.

On Monday, it said DeSantis and Abbott are both “Israel First politicians” and asserted that their designations are intended to silence American Muslims critical of US support for Israeli war crimes.

The Muslim Brotherhood was established in Egypt nearly a century ago and has branches around the world. Its leaders say they seek to set up Islamic rule through elections and other non-violent means.