In the wake of the Tucson tragedy, politicians from both sides of the aisle have called for a more civil discourse in our political debate. On CBS's Face the Nation this morning, Sen. John McCain (R-AZ) said, "There is a lack of respect in our dialogue. … We shouldn't mistake passion for advocacy. In other words, passion is necessary in this debate that we're having, but we've got to make sure it doesn't spill over into personal attacks and impugning people's character or patriotism."

On ABC's This Week, new Tea Party-backed Sen. Mike Lee (R-UT) struck a different tone. He argued that restraining violent rhetoric — such as invoking "job-killing" during the health care repeal effort — would be unwise because it means "the shooter wins":

"The shooter wins if we, who've been elected, change what we do just because of what he did."