-- Over the weekend in Oregon, Obama pleaded ignorance of the decades-old, multi-billion-dollar massive Hanford nuclear waste cleanup:

"Here's something that you will rarely hear from a politician, and that is that I'm not familiar with the Hanford, uuuuhh, site, so I don't know exactly what's going on there. (Applause.) Now, having said that, I promise you I'll learn about it by the time I leave here on the ride back to the airport."

I assume on that ride, a staffer reminded him that he's voted on at least one defense authorization bill that addressed the "costs, schedules, and technical issues" dealing with the nation's most contaminated nuclear waste site.

-- Last March, the Chicago Tribune reported this little-noticed nugget about a fake autobiographical detail in Obama's "Dreams from My Father":

"Then, there's the copy of Life magazine that Obama presents as his racial awakening at age 9. In it, he wrote, was an article and two accompanying photographs of an African-American man physically and mentally scarred by his efforts to lighten his skin. In fact, the Life article and the photographs don't exist, say the magazine's own historians."

-- And in perhaps the most seriously troubling set of gaffes of them all, Obama told a Portland crowd over the weekend that Iran doesn't "pose a serious threat to us" -- cluelessly arguing that "tiny countries" with small defense budgets can't do us harm -- and then promptly flip-flopped the next day, claiming, "I've made it clear for years that the threat from Iran is grave."

Barack Obama -- promoted by the Left and the media as an all-knowing, articulate, transcendent Messiah -- is a walking, talking gaffe machine. How many more passes does he get? How many more can we afford?