From the Caucus Blog: Veto Primer

As the Governor's vetoes are starting to be considered in the House, here's some helpful information on the veto process.

The Illinois Constitution provides the Governor with four possible veto alternatives, below is a brief description of each:


Total Veto

The Governor can veto an entire bill by returning it with his objections to the chamber in which it originated. The General Assembly can override this veto by a vote of three-fifths of the members elected to each chamber.

Item Veto

The Governor can veto any item of appropriations in a bill by returning it to the chamber in which it originated. The General Assembly can override this veto by a vote of three-fifths of the members elected to each chamber. 

Read more on the Caucus Blog.