Michael Bennet's hefty fundraising in the first quarter of the year may have been intimidating at first glance, but a closer examination reveals that the bulk of the money came from out-of-state. Potential primary opponents to Bennet should especially take notice, as his fundraising among traditional Democratic in-state donors is weak and the rest of his in-state fundraising (primarily from the business community) may soon evaporate thanks to his waffling on EFCA.
New York, Washington D.C., and California provided Bennet nearly as many contributions as Colorado did. The graph below shows the source of Bennet's first quarter haul:

PAC contributions to Bennet topped a quarter of a million dollars, which along with the massive out-of-state funding leads one to wonder just who exactly want Michael Bennet to be Colorado's U.S. Senator.
Top sources of funding to Michael Bennet
Colorado - $509,810
PACs and other committees - $261,125
New York - $188,000
Washington DC - $136,958
California - $100,367
Maryland - $36,550
Massachusetts - $30,200
One thing is clear, Bennet's Republican opponent will have to have a strong backing from in-state donors. Those donors aren't going to just come out of no where, they are people like you reading this right now. The Democrats have figured out that in order to win elections they have to man up and give a few dollars, so please donate to Ryan Frazier or Ken Buck. Even if it is just $5 or $10 you can help send Michael Bennet a message that the people of Colorado do not want him in office.