Former House Speaker Newt Gingrich is among the names of possible Republican presidential candidates in 2012.

Gingrich said he'll make his decision on whether to run after the midterm elections this November.

Yet, some think he's already gone into campaign mode, recently delivering a speech on national security to about 200 people at the American Enterprise Institute.

"This is not a war on terrorism. Terrorism is an activity," he said. "This is a struggle with radical Islamists."

Gingrich added that the U.S. is a more important battlefront than the Middle East. He pointed to 54 jihadists who've been arrested in the U.S. on terrorism charges since President Obama took office.

"Every one" of those instances was a breakdown in national security, Gingrich claimed.

Gingrich has also openly opposed plans in New York to build a mosque near Ground Zero, saying there's a double standard for Muslims.

"There should be no mosque near Ground Zero in New York so long as there are no churches or synagogues in Saudi Arabia," Gingrich said recently.

"I just think it's time that we in the West had the temerity to stand up and say, 'you know, enough,'" he added during the AEI speech.

Gingrich said he feels Congress should make Ground Zero and the surrounding area a national battleground to keep the mosque from being built.