Nothing official yet.
This could have been an interesting race. But I am guessing this one was about money.
Republicans were very upset when Campbell announced. There is an unspoken tradition in the Florida Legislature that incoming leaders of both parties tend to get a pass during the election preceding their term. With Jeff Atwater designated as the Republican candidate for Senate President the next two years, tradition would give him a pass this year. So bucking that tradition was sticking a thumb in the Republican eye.
So, with Campbell falling on the sword, it could make the rest of the Senate campaigns a bit more wide open.