Top Democratic lawmakers want to ask Colorado voters this November to permanently set aside the spending cap in the state’s Taxpayer’s Bill of Rights.

House Speaker KC Becker is drafting a measure to put a question on the 2019 ballot that would allow the state to keep as much as $960 million in projected revenues through June 2020 — money that otherwise would get refunded to taxpayers. The proposal would split the dollars evenly between K-12 education, higher education and transportation.

But now Democratic Gov. Jared Polis is not sure it’s the right strategy — or that it can pass.

“Going to the ballot in 2019 is possible, but it’s premature to say that it is the right strategy at this time,” Polis spokeswoman Laurie Cipriano told The Colorado Sun on Wednesday. “The governor wants to ensure that if he supports a ballot initiative that it’s set up for success.”

The dispute only further complicates the party’s effort to rollback TABOR, the state’s unique constitutional restriction on spending that is one of most volatile issues in Colorado politics. And it once again pits the governor against lawmakers in his own party early in his term.