In the wake of the Supreme Court's recent ruling to deregulate corporate political spending, public attention has focused squarely on whether businesses and for-profit companies will now lavish big money on elections.

But Citizens United v. Federal Election Commission may have as much or more impact on another type of incorporated organization -- nonprofits of all stripes. These include 501(c)4 advocacy groups, 501(c)5 labor unions, 501(c)6 trade associations and even 501(c)3 charities, which face both fresh opportunities and dangers in the wake of Citizens United.

Associations and advocacy groups can be expected to ramp up their political activities, election lawyers say. At the same time, the ruling -- by equating corporate and individual First Amendment rights -- could trigger sweeping changes in IRS law as it applies to political activity, some tax experts say. All this could thrust 501(c)3 charities, which are now barred from engaging in partisan political activities, into an uncomfortable spot.

You can read Eliza's full column here.