Although the Democrats officially have not settled on a choice for president, Barack Obama and the GOP’s likely nominee John McCain have been going at one another as if they had. Over the past few days, the two have “debated” each other over issues such as how the United States should deal with threats such as Iran.

Yesterday in Oregon, Obama said:

“Iran, Cuba, Venezuela—these countries are tiny compared to the Soviet Union. They don’t pose a serious threat to us the way the Soviet Union posed a threat to us. And yet we were willing to talk to the Soviet Union at the time when they were saying, ‘We’re going to wipe you off the planet.’”

In Obama’s backyard, Chicago, today, McCain, reacted:

“Such a statement betrays the depth of Senator Obama’s inexperience and reckless judgment. These are very serious deficiencies for an American president to possess. … The threat the government of Iran poses is anything but tiny.”

Then later today in Montana, Obama came back with:

“Let me be absolutely clear: Iran is a grave threat. [But] the Soviet Union had thousands of nuclear weapons, and Iran doesn’t have one.”

Your turn, Sen. McCain. …