The race for Pennsylvania’s 21 Electoral College votes remains close, but Barack Obama is back on top.

The latest Fox News/Rasmussen Reports telephone survey in the state finds Barack Obama attracting 48% of the vote while John McCain earns 45%. A week ago, the two men were tied at 47%. Two weeks ago, Obama was up by two points.

Obama currently is supported by 81% of Democrats and holds a double digit lead among unaffiliated voters. Ninety percent (90%) of Republicans plan to vote for McCain (demographic crosstabs available for Premium Members).

Obama is viewed favorably by 56% of the state’s voters, McCain by 53%.

When it comes to the economy and jobs, Obama is trusted more by 48% of the state’s voters, McCain by 41%.

On national security, McCain has the edge, 48% to 42%.

This week, the number of Pennsylvania voters who name the economy as the top voting issue jumped to 45% from 35% a week ago.

Among the five battleground state polls released tonight, Pennsylvania has the highest level of undecided voters (5%). This alone will be enough to keep the candidates and their surrogates in Pennsylvania over the coming six weeks. See overview of all five polls.

Forty percent (40%) of Pennsylvania voters would be very or extremely comfortable with Obama as President. Thirty-six percent (36%) say the same about McCain. Those figures reflect a seven-point drop for McCain and little change for Obama.

Thirty-four percent (34%) say they would not be comfortable at all with Obama as President and 38% say the same about McCain.

Voters are evenly divided as to whose advice they would seek for the toughest decision of their life—45% say they’d prefer McCain and 44% choose Obama.

Rasmussen Markets data shows that Democrats are currently given a % chance of winning Pennsylvania’s 21 Electoral College Votes this fall.

See survey questions and toplines. Crosstabs available for Premium Members only.