SAN ANTONIO -- President Obama on Tuesday said his campaign is asking voters to "examine" Mitt Romney's private sector experience, saying it's his opponent's "calling card" for the presidency.

Seeking to keep the conversation on Romney's time at private equity firm Bain Capital for another day, Obama continued to tie his opponent to outsourcing.

"His main calling card for wanting to be president is his private sector experience," Obama told a crowd at a campaign event in San Antonio.  "So we asked the voters to examine that experience." 

Romney, Obama continued, "invested — made money investing in companies that had been called 'pioneers' of outsourcing."

"I don’t want pioneers of outsourcing in the White House; I want somebody who believes in insourcing," he said. "Let’s bring those jobs back home." 

Obama went on to explain that his vision for the country was "making things here in the United States of America, so I want to end tax breaks to companies that are shipping jobs overseas.  Let’s give tax breaks to companies that are investing right here in Texas, right here in the United States of America.  Let’s put American workers back to work selling goods stamped with three proud words:  Made in America."

Obama traveled to Texas on Tuesday to boost his campaign war chest. While the state hasn't voted for a Democrat in a presidential race since 1976, it has proven to be a bountiful fundraising stop for Obama, who is expected to raise about $2 million from four events.

During the speech, Obama continued to ramp up his populist pitch, telling supporters that supporting the middle class was "at the heart of the difference in this debate."

Once again, he sought to brush off critics who say he's against wealth.

"I believe in individual initiative and entrepreneurship and risk-taking," Obama said. "And I believe that the free market is the greatest system on Earth to create wealth and prosperity.  But just like Abraham Lincoln said, there are some things we do better together than we do on our own."

At another event later in the day, before a crowd that included actress Eva Longoria and U.S. Trade Representative Ron Kirk, Obama sought to explain that even though Texas isn't a swing state, "the issues we face are just as relevant here."

"We have two stark choices, two fundamentally different visions," he said, speaking at the home of Mikal Watts, a trial lawyer. "My opponent and his allies in Congress and his allies here in the Lone Star State believe that the way you grow the economy is from the top down and with more tax cuts that benefit many in this room, including myself."