* The Tribune looks at the bill to postpone today’s mandated CPS $634 million pension payment for 40 days…

Rauner last week vetoed the majority of a Democrat-passed state spending plan, the exception being a portion that funnels money to elementary and high schools.

Those state aid payments are scheduled to go out Aug. 10, and the pension delay proposal would postpone the massive payment until the same date. The idea was to buy the city some time to cobble together enough money for the payment — an effort that would be helped by the infusion of state dollars — while a broader pension overhaul is worked out.

Such a measure needs 71 votes to pass, which is the same number of Democrats in the chamber. Just 37 voted in favor last time amid opposition from some who didn’t want to be viewed as voting for a pension holiday and others who didn’t want to bow to Emanuel.

Complicating things are questions about whether Rauner has pulled his support from the bill. While he backed the measure last week, he’s since floated an alternative. Under that plan, the state would give CPS an upfront payment of $450 million in grant money that’s normally distributed over the course of the year. The mayor’s office rejected that idea Monday.

16 Republicans voted for the pension delay bill the last time around. But if Rauner bricks that thing, then most of those HGOPs will back away.

We’ll know soon enough.