With the election now just days away, both candidates are criss-crossing battleground states in an effort to win votes in a race that remains tight.
Republican nominee Mitt Romney plans to campaign in Pennsylvania Sunday, along with his running mate Paul Ryan.
That visit is part of a new drive to win more votes in Pennsylvania. The Romney team said it detects President Barack Obama is vulnerable in the state's southeastern counties, which are usually a Democratic stronghold.
The Republican National Committee is also pumping $3 million into ads in the state.
On Thursday, Romney campaigned in Virginia, while the president hit Wisconsin, Nevada, and Colorado. Obama plans to visit eight swing states before Monday.
Both candidates had briefly tempered their speeches following Hurricane Sandy, but they're now renewing their political attacks.
"The president said he's going to consider putting in place a Secretary of Business," Romney told a Virginia audience Thursday.
"I don't think that what we need is another government bureaucrat that supposedly knows something about job creation," he said. "I think it would be helpful to have a president who actually understands job creation."
The president fired back, saying, "Governor Romney has been using all his talents as a salesman to dress up the very same policies that failed our country so badly, the very same policies we've been cleaning up after for the past four years."
Independent New York City Mayor Michael Bloomberg has now endorsed the president. Still, polls show Obama and Romney are virtually tied.