An inflammatory ad depicting a Hispanic-looking immigrant in a hoodie shooting a white woman led to an unusual one-issue debate Tuesday night between a Republican who might run for Florida governor and a Democrat already in the race.

Republican House Speaker Richard Corcoran and Democratic Tallahassee Mayor Andrew Gillum took an exchange that began on Twitter two weeks ago to a television studio, debating a priority bill for Corcoran that would punish local governments if they don’t cooperate with authorities enforcing federal immigration laws.