Pennsylvania could be the bellwether for how the nation will go on Nov. 2. And if that's the case, it could be a Republican landslide.

From a new Fox News poll:

Pushback on Obama Agenda Gives Dems Trouble in Pennsylvania

Opposition to the policies of the Obama administration is helping Republican Pat Toomey gain an edge in Pennsylvania’s Senate race, according to a new Fox News poll.

Toomey drew 47 percent support among likely voters, compared to 41 percent for Democrat Joe Sestak in the race to replace Sen. Arlen Specter. Eleven percent were undecided.

Half of respondents said they wanted their vote to represent opposition to the policies of the Obama administration, and 56 percent favored repealing the president's national health care program. Only 40 percent approved of the job Obama is doing as president. The president carried Pennsylvania in a 10-point landslide in 2008.

Thirty-one percent said they were dissatisfied with the way the federal government works. Thirty-five percent said they were angry about it.

Jobs and the economy are far and away the top concerns for Pennsylvania voters -- 41 percent said these were most important. Concerns about the deficit and federal spending ranked second with 29 percent.

That could mean trouble for Sestak, who welcomes Obama for a campaign event in Philadelphia next week. While 21 percent of respondents said Obama's policies have helped the state's economy, 41 percent say they have hurt and 32 percent think they haven't made much of a difference. A 42-percent plurality in the industrial state opposes a plan to cap carbon emissions like the one proposed by Obama.

Republican gubernatorial candidate Tom Corbett is faring even better than Toomey. Corbett led Democratic nominee Dan Onoroto 50 percent to 40 percent.

Read more about key races at FoxNews.com