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During a GOP debate, U.S. Sen. Rand Paul raised the topic of the immigration status of those who committed terrorist attacks in the United States. Evidence shows that many attackers were American-born or came here legally.

•  Comparing the GOP candidates' ISIS strategies with Obama's

• Our 2015 Lie of the Year coverage

We summarize several stories about Lie of the Year. 

These fact checks covered Democrats as well as Republicans, on taxes as diverse as taxes and foreign kings.

Also: Our top Scott Walker factchecks from 2015

Reviewing the five most-clicked 2015 fact checks of the politician we fact checked most in 2015.

Smoke streamed from some of our most-clicked fact checks of 2015--including the Pants on Fire rating smacked onto a ridiculous Rush Limbaugh claim that Austin was banning barbecue restaurants.

Just ahead, our 10 most-clicked fact checks of 2015...

The Republican candidates have criticized President Barack Obama's plans to fight ISIS. How do their proposals differ? 

• The 2015 Lie of the Year

• Readers' Poll results

• A look back at previous years winners

People get the facts wrong even about Christmas.
 

Ho ho ho!

Readers weigh in on our selection of the campaign misstatements of Donald Trump as our 2015 Lie of the Year.

• The 2015 Lie of the Year

• Readers' Poll results

• A look back at previous years winners

• Trump reacts to Lie of the Year 

Hours after seeing his campaign statements named the 2015 Lie of the Year, Republican frontrunner Donald Trump took aim at PolitiFact, calling us a "totally left-wing group."

Read the Lie of the Year

A presidential candidate with an unprecedented record on the Truth-O-Meter earns PolitiFact's annual award.

A presidential candidate with an unprecedented record on the Truth-O-Meter earns PolitiFact's annual award.

A presidential candidate with an unprecedented record on the Truth-O-Meter earns PolitiFact's annual award.