ALBANY—Jim Tedisco is leading Scott Murphy by 12 points (46 to 34) in a new poll released today. That’s a pretty good showing for Murphy, who had nearly no public profile when he announced his candidacy at the beginning of this month to succeed Kirsten Gillibrand in Congress. It’s also less than the 15-percentage-point partisan enrollment edge. “So far, Murphy has done a better job of garnering the support of Democrats, 70-16 percent, than Tedisco has done with Republicans, among whom he leads 63-18 percent. Tedisco, however, has a significant 45-31 percent lead among independent voters,” said Steve Greenberg, a spokesman for the Siena Research Institute.