In the United States, marijuana is still illegal on the federal level, despite being legal either recreationally or medicinally in 29 states. This gap in regulation is creating confusion for those operating legal cannabis businesses in the states where it is legal. U.S. Rep. Earl Blumenauer (D-OR) introduced a comprehensive bill to regulate and tax marijuana to Congress last month. Rep. Blumenauer joined CBSN with Bill Piper, senior director of the Office of National Affairs for the Drug Policy Alliance, to talk about the bill -- and where American marijuana is headed next. Subscribe to the "CBSN" Channel HERE: http://bit.ly/1Re2MgS Watch "CBSN" live HERE: http://cbsn.ws/1PlLpZ7 Follow "CBSN" on Instagram HERE: http://bit.ly/1PO0dkx Like "CBSN" on Facebook HERE: http://on.fb.me/1o3Deb4 Follow "CBSN" on Twitter HERE: http://bit.ly/1V4qhIu Get the latest news and best in original reporting from CBS News delivered to your inbox. Subscribe to newsletters HERE: http://cbsn.ws/1RqHw7T Get your news on the go! Download CBS News mobile apps HERE: http://cbsn.ws/1Xb1WC8 Get new episodes of shows you love across devices the next day, stream local news live, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- CBSN is the first digital streaming news network that will allow Internet-connected consumers to watch live, anchored news coverage on their connected TV and other devices. At launch, the network is available 24/7 and makes all of the resources of CBS News available directly on digital platforms with live, anchored coverage 15 hours each weekday. CBSN. Always On.