The party left them, they didn`t leave it. The party has become the Conoco caucus. https://www.adn.com/politics/article/series-conoco-employees-help-ease-oil-tax-bill-through-legislature/2013/03/28/
My respect for these three legislators just skyrocketed.  I wouldn`t blame them if all three left party politics and became "independent" politically.  I hope the new house shames the senate to act fiscally.
It`s evident the oily republicans would rather we CONTINUE oil subsidies, and put the fiscal ship on the rocks, yelling "cuts first" as we break to bits,,..rather than work together to find realistic practical and meaningful long-term revenue fixes so we don`t FURTHER destroy the fabric of our young state`s social and physical infrastructure.  These three legislators, the three of them, should join the ranks of independent legislators, who are not "married" to a party.  At least the lines would be clearer as to who`s an oil industry lackey, and who is a statesman or stateswoman.