New polling in the Louisiana Senate race shows GOP challenger Suzanne Terrell with an eight-point lead over Democratic incumbent U.S. Sen. Mary Landrieu. The numbers show that Terrell’s base is excited, but Landrieu’s is not, which is going to put Landrieu in the difficult position of having to run more to the left. Over 40 percent of Democratic voters say they’re for Terrell, which is certainly good news, but it means less than you might think. Under the state’s open primary system, party registration doesn’t mean anything. I once asked my dad, a registered Democrat, who was the last Democratic presidential candidate he voted for. “JFK,” was the reply. That’s pretty common in the Bayou State.