A budget quandary

California’s budget doesn’t exist in a vacuum. Here are the unknowns shaping a spending plan that starts on July1:

Affordable Care Act: If Republicans repeal it and halt the money flowing to California, the budget stands to lose upward of $16 billion.

Tax revenue: The state’s booming economy is yielding billions in extra taxes. Or is it? Gov. Jerry Brown suggests the income stream may be tailing off. An $8 billion rainy day fund could patch things.

New programs: More housing? Road repairs? These plans stalled last year and could go forward — or die again — if the budget picture sours and lawmakers feud.