Judge Amy Berman Jackson threw out the regulation, setting up another showdown at the sharply divided agency
The trend comes even as some business groups discourage them from doing it.
The constitutional amendment would have given lawmakers more power to constrain campaign spending.
The longshot measure would provide elected officials with a legal authority to curb big money.
The trend line is in their favor -- though the numbers aren’t huge yet.
Campaign finance lawyers expect such committees to proliferate on both sides of the aisle.
The ruling reverses an earlier ruling by members of the same court.