In May or June, Italian voters will decide whether they support a constitutional reform to reduce the number of seats in the Chamber of Deputies from 630 to 400 and in the Senate from 315 to 200. The referendum itself could force an early general election, especially if any of the parties in government push to hold a snap poll before the reduction in the number of parliamentarians becomes official and before changes in electoral law to establish how the members of a smaller Parliament are elected could be enacted....