Raw Story has info on a case that might have an impact on NC evangelical churches that engage in direct electioneering. In the past few years, the IRS overlooked this type of activity and direct involvement in campaigns for candidates and coordination between candidates and churches has exploded.
A judge has ruled that a case by Freedom from Religion Foundation to force the IRS to enforce the laws and regulations can move forward.
Some of the big evangelical outfits, like Focus on the Family, established separate organizations focused on political activism and lobbying to get around the laws, but they're just a formality with close coordination and staffing sometimes share between the religious group and the political organization. Smaller churches haven't even bothered with that and just jumped into the political fray.
You can expect fights over church involvement in campaigns to be one of the big issues that Congress, state legislatures and the courts look in the next couple of years as Republicans, with demographics making it harder for them to win majorities, start looking for any angles to get out extremist conservative voters.