Pennsylvania

It's not just about winning states. Winning a presidential nomination includes mastering complex rules about delegates, and Pennsylvania's rules are among the most complicated.

For decades, coal was king of electricity generation in the U.S., but that's changing. Across the country, coal power plants are being replaced with generators that run on cleaner burning natural gas.

Savvy patients want the best medical care for the best deal, and online calculators seem like a great way to compare the cost of common scans and procedures. But many are inaccurate.

Professors in Pennsylvania are upset over a new law that requires them to be fingerprinted and undergo thorough background checks. The law came in the wake of the Jerry Sandusky sexual abuse scandal.

Driven by new regulations and fracking, more coal power plants are retiring for cheaper, cleaner-burning natural gas. But scientists have yet to work out the fossil fuel's imperfect climate footprint.

A Supreme Court ruling could threaten health insurance subsidies in about three dozen states. But many states aren't sharing contingency plans lest they be seen as supporting Obamacare.

Federal laws require states to keep lists of convicted sex offenders, including juveniles. But recently, the practice of registering minors has come under scrutiny.