7 lessons from Rick Santorum's insurgent campaign

The social conservative took his long-shot, low-budget White House bid further than anyone imagined possible. What does that tell us about presidential politics?

(Image credit: Whitney Curtis/Getty Images)

Following Rick Santorum's abrupt departure from the Republican presidential race on Tuesday, Mitt Romney now has an easy path to the GOP nomination — and, because of Santorum, political scientists have a new case study in the whimsy of presidential politics. The former U.S. senator from Pennsylvania began his low-budget race for the White House as some combination of asterisk and punchline, and remained an afterthought until his surprise win in the Iowa caucuses. He leaves the race the only candidate who came within striking distance of topping Romney. What can we learn from Santorum's wild, improbable ride? Here, 7 lessons:

1. Money isn't everything in campaigns...

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