Last week was domestic policy. This week, foreign policy.

House Minority Leader John Boehner (R-OH) is poised Tuesday to carve out differences between Congressional Republicans and President Obama in the national security arena. The Ohio lawmaker is slated to speak at the American Legion Convention in Milwaukee, just hours after an address from outgoing Defense Secretary Robert Gates.

Boehner's speech comes as the president prepares to speak to the nation about the official end of combat operations in Iraq Tuesday night. Vice President Biden just arrived in the country for a visit Monday.

A Boehner aide familiar with the speech says that the top House Republican will "discuss the serious challenges that remain, how Iraq is critical to our immediate and long-term national security interests, and the need to protect the economic, political, and security progress that has been made."

But Boehner's staffer also says the top House Republican will also bring up the 2006 military surge in Iraq and how "then-Senators Obama and Biden, Speaker Pelosi, and Majority Leader Reid" opposed it.

Boehner is also expected to address the possibility of a terrorist attack on U.S. soil and problems he sees with the Democrats' approach to fighting terrorism.

Boehner spoke to the City Club of Cleveland last week about the economy and how Republicans would bolster the job picture if they were in charge.

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