(AP) -- More information about Gov. Pat Quinn's budget proposal is coming soon.

The Democratic governor's staff is expected to provide details on the plan tonight in advance of Quinn's official budget speech tomorrow.

The administration has already talked about some of the spending cuts and borrowing that Quinn believes will be needed to balance the budget. But it hasn't been so open about the tax increase that Quinn wants.

Last year, Quinn proposed raising the basic tax level by 50 percent. That failed in the Legislature and lawmakers show little interest in discussing the idea again during an election year.

But the state's budget deficit continues to climb. Experts predict it will top $13 billion in the coming fiscal year.