U.S. President Barack Obama says his “middle-out, bottom-up” economic approach will push the country ahead in the next four years.

“I don't believe in top-down economics. I believe in middle-out economics. I believe in bottom-up economics. I believe in fighting on behalf of working families and giving them opportunity, and putting some money in their pockets, because when we do that everybody does better.”

Speaking at a campaign stop in the San Antonio, Texas, Mr. Obama said that, if elected, he will continue to fight for those goals…

“In 2008, I made a promise we'd end the war in Iraq. We ended it. I promised to go after (Osama) bin Laden. We got him.”

… while also investing in rebuilding the country.

“Let's take half the money that we've spent on war to pay down the deficit. Let's use the other half to do some nation building here at home.”

Mr. Obama lost the state of Texas to his Republican opponent in the 2008 election.

Meanwhile, presumed Republican presidential nominee Mitt Romney campaigned in Pittsburgh, Pennsylvania Thursday.

Mr. Obama carried Pennsylvania in the 2008 election, and recent opinion polls show him holding a narrow lead there over Romney.

The Republican challenger said again Tuesday that he will not give in to growing pressure to release income tax returns prior to 2010. The Obama campaign has raised questions about why Romney will not release more of his tax returns, but he said Tuesday that doing so would only give the political opposition “more pages to pick through, distort and lie about.”