WASHINGTON (AP) — When the Obama administration agreed to set the first-ever federal limits on runoff in Florida, environmental groups were pleased. They thought the state's waters would finally get a break from a nutrient overdose that spawns algae, suffocates rivers, lakes and streams and forms byproducts in drinking water that could make people sick.

Nearly three years later — with a presidential election looming and Florida expected to play a critical role in the outcome — those groups are still waiting. The rules, originally scheduled to take effect in March, now won't be active until next January, and even then could be replaced altogether by state-drafted regulations.

In fact, a growing number of regulations are being delayed at federal agencies or at the White House. The list includes a rule cracking down on junk food at school bake sales, another banning children from dangerous work on farms and one setting federal standards for disposing toxic ash from coal-fired power plants.