A third polling organization -- and maybe a fourth? -- will say tomorrow that Joe Sestak is up 5 over Arlen Specter.

Muhlenberg and Rasmussen have already had Sestak pulling ahead of his Dem rival. From Greg Sargent at the WashPost's Plum Line blog:

Tomorrow, a third poll will come out finding Joe Sestak is leading Arlen Specter in the Pennsylvania Dem primary. The poll, from Franklin & Marshall College, will mirror others showing Sestak ahead by around five points, the poll's director confirms to me.

Anything can happen between now and next Tuesday. But Sestak might really pull it off.

Quinnipiac is also due to release a new senate/governor's race poll tomorrow.