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Poll: Sestak within striking distance in Penn.

It’s a swing state that’s been the site of many down-to-the-wire elections, and a new poll indicates that the Senate race in Pennsylvania might be no exception.

The Susquehanna Polling & Research survey conducted for the Pittsburgh Tribune-Review poll shows Democrat Joe Sestak within the margin of error in the race against Republican Pat Toomey for the seat that Republican-turned-Democrat Sen. Arlen Specter held for 30 years.

The poll found Sestak trailing Toomey 42 percent to 45 percent. The margin of error is 3.5 percent.

Sestak, who defeated Specter in the May 18 primary, is winning about 40 percent of Independents, according to the survey, compared to 30 percent who support Toomey. About one in 10 voters are undecided.

Toomey has consistently led in most polls since the primary. A recent CNN/Time poll gave Toomey an edge of 5 points in the race, while Franklin & Marshall College’s poll put the spread at nine last week.

NBC News rates this race a toss-up.