ST. PAUL  (AP) -- Possible GOP presidential candidate and former Minnesota Gov. Tim Pawlenty is calling for "a more civil, thoughtful discourse in this country" after the shooting tragedy in Arizona.

Pawlenty made the TV rounds Tuesday to promote his new autobiography. He said on ABC's "Good Morning America" that he's seriously considering a White House bid but not ready to announce one.

Asked about the attempted assassination of Democratic Rep. Gabrielle Giffords, Pawlenty predicted it would alter political debate. He differentiated himself from Sarah Palin by saying he never would have used crosshairs on a map as she did to signal GOP campaign targets. But he stressed there "was no evidence" to suggest it motivated the shooting.

Pawlenty also had plans to appear on programs on Fox, CNN, MSNBC, CNBC and Comedy Central.

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