In his weekly address today, President Obama addressed the Supreme Court's decision in Citizens United v. FEC.
You can read his address here [1]. And you can sign People For's petition [2] to pass a Constitutional Amendment allowing Congress to regulate corporate influence in elections.
Links:
[1] http://www.whitehouse.gov/the-press-office/weekly-address-president-obama-vows-continue-standing-special-interests-behalf-amer
[2] http://site.pfaw.org/site/PageServer?pagename=Amend&autologin=true
[3] http://blog.pfaw.org/category/organizations/citizens-united
[4] http://blog.pfaw.org/category/topics/citizens-united-v-fec
[5] http://blog.pfaw.org/category/topics/congress
[6] http://blog.pfaw.org/category/topics/corporate-influence
[7] http://blog.pfaw.org/category/topics/elections
[8] http://blog.pfaw.org/category/topics/petition
[9] http://blog.pfaw.org/category/topics/supreme-court