There’s some GOP debate fatigue. (Win McNamee/GETTY IMAGES)

We were struck by this quote in a story about the GOP candidates abandoning plans for a 563rd debate, from a supposed man-on-the-street type--a car salesman. From Farmington Hills, Mich., “I think primary voters know where these guys stand now. At this point, the left is just clearly looking for tape they can use.”

Sounds like an observation from an operative, not an average Joe.

Elsewhere, we gleaned these fun facts about the charitable giving of the GOP candidates: Former senator Rick Santorum and his wife, Karen, donated about 1.8 percent of their income to charity in 2010, our colleagues Dan Eggen and Rosalind Helderman reported. Former speaker Newt and Callista Gingrich were next, with 2.8 percent and former Massachusetts governor Mitt Romney and wife Ann donated about 13.8 percent of their gross income to the Mormon church and other causes.

There’s a nifty chart comparing the candidates’ tax returns here.

And was Mitt Romney, as he claimed, really a “severely conservative” governor”? Our colleague David Fahrenthold says that depends on what the definition of “severe” is.

Also, the what’s-up-with-Colbert mystery continues.