(CNN) - President Obama said Thursday evening that he was under "no illusions" that he now has a "rubber stamp" in the Senate for his policy agenda just because Pennsylvania Sen. Arlen Specter had switched his party affiliation from Republican to Democrat.
Assuming Democrat Al Franken is finally declared the winner in the Minnesota Senate race, Specter's decision to leave the GOP would appear to give Obama the 60th vote needed to help him overcome Republican-led filibusters. But as the president noted, it is not just Specter who he needs to lobby to support his legislative goals, but also a handful of Democrats who might not always agree with him.
Obama didn't name any names, but it is safe to assume that he means the handful of centrist Democrats who hail from the South and from Middle America. Keep an eye on Sen. Ben Nelson of Nebraska and Sens. Blanche Lincoln and Mark Pryor of Arkansas, all of whom could wield considerable influence in this Congress.