W. Bush, the one-termer who succeeded him, and that selfsame Chester Arthur.

WSJ: In Pursuit of the Presidential Performance Poll

Here we can distinguish between, say, Jimmy Carter, a one-termer expelled by the voters, and Reagan, a two-term president succeeded by his own vice president.

WSJ: In Pursuit of the Presidential Performance Poll

Consider Dwight Eisenhower, initially pegged by historians as a mediocre two-termer.

WSJ: In Pursuit of the Presidential Performance Poll

Let's move on to a neighboring state, Georgia, and the Republican incumbent there, first termer Saxby Chambliss, is getting a surprisingly tough fight from Jim Martin.

NPR: Ahead Of Election, GOP Senate Seats Vulnerable

Wisconsin's Russ Feingold, another three-termer who has spent his entire adult life in politics, could also be making a career decision if he votes to raise taxes.

WSJ: Review & Outlook: Senate Tax Showdown