Rick Scott in 2018 AdWatch

On Environment: Lake Okeechobee water is murky, but it's a federal issue

Scott has run a TV ad accusing Nelson of having done nothing during his time in Congress to improve the situation with Lake Okeechobee. Seasonal discharges from the lake have fueled toxic algae blooms along the Treasure Coast and in Southwest Florida.

Whenever heavy rains raise Lake O's water level, the Army Corps of Engineers releases billions of gallons of water from the lake through canals. Since the federal government controls those discharges, Scott blames Nelson for not doing more to stop it.

But the Army Corps doesn't control the quality of the water in the lake. Environmental groups across the state have been harshly critical of Scott's tenure in Tallahassee, saying his administration's budgets cuts for environmental programs helped lead to the water problems now plaguing the state.