Another poll, another big lead for Sen. Arlen Specter.

A brand-new Rasmussen Reports survey, out today, shows Sen. Arlen Specter leading likely challenger Rep. Joe Sestak 51 percent to 32 percent in Pennsylvania's 2010 Democratic Senate primary. The usual caveat applies: It's early, and Specter has decades of name identification, which early polls pick up. Read all about it here.

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