Whitehouse.gov has a petition section. They promise to publicly respond to petitions of over 25,000 signatures.
Texas now has >45,000 signatures (since Nov. 7th), and there are around two dozen states with petitions now and more keep popping up for public view once they get at least 150 signers. Louisiana is close to reaching the mark also.
*edit: The Texas petition gained 5000 signers in the last 45 minutes since I posted this.