President Trump said Tuesday that Democratic Sen. Bill Nelson of Florida has not been proactive when it comes to solving the algae problem in his state’s largest lake, Lake Okeechobee.

“.@FLGovScott has been relentless in securing the funding to fix the algae problem from Lake Okeechobee – we will solve this! Congress must follow through on the Government’s plan on the Everglades Reservoir,” Trump posted to Twitter. “Bill Nelson has been no help!”