Clinton or Sanders would likely build on the new limits to regulate existing plants.
Oil-and-gas producers have a financial incentive to make sure methane isn't leaking from wells and pipelines. Yet methane has become a well-documented problem--and once it joins the atmosphere, scientists will tell you, it becomes a potent greenhouse gas, responsible for a quarter of the Earth's ext...
13:14 AP FACT CHECK: When Trump takes credit and assigns blame11
18:23 Trump says 'massive tax cut' coming in reform package being unveiled next week
13:08 Trump calls first 100 days a ‘ridiculous standard’ — even though he set it as a standard20
01:07 4 Hours at the White House With Ted Nugent, Sarah Palin and Kid Rock18