Obama took 47 percent support in the poll, while Romney took 40. That’s in line with the Real Clear Politics average of polls, which shows Obama with an eight-point lead in the Keystone State.

Pennsylvania is one of 12 key swing states that Obama won in 2008 that will be critical in determining the outcome of the 2012 election. Pennsylvania’s 20 electoral votes are the third most at stake among swing states, behind only Florida and Ohio.

Obama won Pennsylvania by 11 percent over Sen. John McCainJohn McCainTrump fires opening salvo in budget wars Overnight Finance: Trump budget to boost military, slash nondefense spending | Senate confirms Commerce pick | House Intel chief won't subpoena tax returns Overnight Defense: Trump proposes 3B defense budget | Defense hawks say proposal falls short | Pentagon to probe Yemen raid MORE (R-Ariz.) in 2008.

The poll of 1,227 likely voters was conducted between July 9 and July 10 and has a 2.8 percent margin of error.