Garth D. Everett

A decade later, gas drilling tax politics roil Pennsylvania

A decade after energy companies began realizing the explosive economic potential of the vast Marcellus Shale natural gas reservoir, the politics of taxing it still roils Pennsylvania, now the nation's No. 2 gas state.

Democratic Gov. Tom Wolf made taxing Marcellus Shale production a centerpiece of his successful 2014 campaign, and it stands to be prominent in next year's re-election bid after three years of pressing the Republican-controlled Legislature to make multibillion-dollar exploration companies pay their "fair share."

It's closer than ever: tax legislation passed the Senate in July, and a similar bill underwent two days of debate this week in the House of...