Exelon (NYSE: EXC) is the second largest utility in the US, and up until now it's been providing shareholders with one of the greatest dividends in the industry. But the company recently hinted that if it were to stay on its current track, either the dividend would have to fall or its credit rating could suffer. Investors reacted negatively, driving the share price down to a 52-week low. In this video, Motley Fool energy analyst Taylor Muckerman tells us how this company has made both its dividend and its credit rating into top priorities, and what spending cuts it's identified to keep the dividend stream alive.