Here is an article from last year that surmised the so-called 'Kansas experiment'.
In 2013, Mr. Brownback set out to create a lean, business-friendly government in his state that other Republicans could replicate. He now faces a $350 million deficit when the Kansas legislature convenes in January and projections of a larger one in 2018. The state’s economy is flat and his party is fractured. “The broad effect of that tax action has been to dramatically destabilize the Kansas budget,” said Duane Goossen, senior fellow at the nonpartisan Kansas Center for Economic Growth and a former state budget director.