While a poll from Rasmussen Reports last week showed Republican former Congressman Pat Toomey beating Democratic Senator Arlen Specter in a reelection match-up, a poll for a leftist Web site shows different findings. The far-left Daily Kos commissioned a Research 2000 poll which has Mr. Specter beating Mr. Toomey 45 percent to 40 percent. It also shows Mr. Specter beating U.S. Rep. Joe Sestak, D-7th, of Chester, Delaware and Montgomery counties in a primary match-up with a margin of 48 percent to 33 percent. In a potential Toomey-Sestak general-election contest, Mr. Sestak has a one-percent edge over Mr. Toomey, the...