PHILADELPHIA (AP) — A surge in support for conservative challenger Rep. Pat Toomey one week before the primary has narrowed incumbent Sen. Arlen Specter's lead in Pennsylvania's Republican race for U.S. Senate to a scant five percentage points, according to a poll released Tuesday. In a Quinnipiac poll released April 7, Specter held a comfortable lead of 15 percentage points. The primary is April 27. Fifty-one% of the respondents in the latest poll said they considered the moderate Specter, who is seeking a fifth term, "too liberal," up from 43% in the previous survey. Only 14% said they consider Toomey...