Mexico is one of few* countries to prohibit legislators from serving consecutive terms. This past week, President Felipe Calderon announced that he will propose that legislators be permitted to seek reelection.
Quick reaction #1: good idea, as it would give the 300 members elected from single-seat districts (200 others are elected via closed-list PR) the incentive to actually represent the electorate of their districts, rather than immediately upon election seek to curry favor with whoever may offer them their next job.
Quick reaction #2: good luck passing it. The PRI, which is currently just short of a majority in the Chamber of Deputies, is unlikely to agree to a reform that would restrict the authority of party leaders (who tend to offer members that next job referred to in quick reaction #1). Even if the party wins back the presidency,** we are unlikely to see the degree of centralization and presidentialization of the halcyon days of PRI hegemony. However, in opposition, the PRI has become a “gubernatorialized” party, and the governors presumably would stand to lose much influence if legislators could seek longer tenure in congress.
* One of only two? (Costa Rica is the other one I know of.)
** Conventional wisdom seems to be that the party is a shoo-in for 2012. I am not so sure. That the party can do so well in midterm congressional elections when it is in opposition (such as in July 2009), and in gubernatorial elections (it governs almost two thirds of the states), says less than meets the eye about its prospects of finding a single candidate who can unite the party and appeal broadly enough win the presidency. Much will depend on whether the PAN finds a popular enough candidate to appeal beyond its narrow base and whether the PRD can pull itself together enough to appeal to the more leftist elements of the PRI constituency. (Mexican presidents are elected by nationwide plurality, and Calderon himself won about 36% in 2006 and defeated then-PRD candidate Lopez Obrador by the narrowest of margins.)