Washington (AP) - A bitterly divided Supreme Court vastly increased the power of big business and unions to influence government decisions Thursday by freeing them to spend their millions directly to sway elections for president and Congress.

The ruling reversed a century-long trend to limit the political muscle of corporations, organized labor and their massive war chests. It also recast the political landscape just as crucial midterm election campaigns are getting under way.

In its sweeping 5-4 ruling, the court set the stage for a wave of likely repercussions -- from new pressures on lawmakers to heed special interest demands to increasingly boisterous campaigns featuring highly charged ads that drown out candidate voices...