Why not take a page from the right wing's book with Senator Specter and have everyone who donated to Senator Hagan's campaign either directly or thru Act Blue and the like, ask for their money back if she can't support those issues that are most important to them.
I'd venture that 75% of her contributors from the blogosphere (which donated significant amounts of money to her election campaign and I believe more so than the insurance industry has to date) would not have done so had they been aware of her position in support of the insurance industry at the cost of our individual health and financial well being.