A presidential candidate criticized big banks and Wall Street Monday, but it wasn't Bernie Sanders or any of the other Democrats.

Republican White House hopeful Rick Santorum said that he has "real concerns about too big to fail," while speaking with reporters in Washington, D.C.

"I have real concerns about the size of the banks and think that while I've looked at various ideas as how to break up these financial institutions, I would certainly be open to ideas that would reduce systemic risk," Santorum said.

In contrast with what he sees as a the big-government solutions of Sanders, Hillary Clinton and Martin O'Malley, Santorum proposed that the federal government could create regulations and laws that would lead to banks deciding on their own terms to break up.

O'Malley has made reforming Wall Street a key component of his platform, often stating that those responsible for the 2008 fiscal crash on Wall Street are "criminals." Sanders has repeatedly called for the re-installation of Glass-Steagall. Clinton has said "too big to fail is too big."

Santorum is one conservative Republican who hasn't ducked these issues, though he doesn't agree with everything Washington has done in the name of regulating Wall Street.

"I would be more oriented towards clearly Dodd Frank is a disaster and needs to be redone," Santorum said. "The institutionalization of too big to fail is something that has to be unwound, including unwinding some of these large institutions."