Among the myriad falsehoods and attacks that Hannity promoted throughout 2008, several found their way into regular rotation:

Obama will "invade" Pakistan

Hannity: 2008 'Mis- informer of Year'

As Media Matters for America has demonstrated time and again, Fox News' Sean Hannity has been a prolific and influential purveyor of conservative misinformation. But never has he so enthusiastically applied his talents for spreading misinformation as he did to the 2008 presidential race, focusing his energies primarily on President-elect Barack Obama. Day after day, Hannity devoted his two Fox News shows and his three-hour ABC Radio Networks program to "demonizing" the Democratic presidential candidates, starkly explaining in August: "That's my job. ... I led the 'Stop Hillary Express.' By the way, now it's the 'Stop Obama Express.' " Hannity's "Stop Obama Express" promoted and embellished a vast array of misleading attacks and false claims about Obama. Along the way, he uncritically adopted and promoted countless Republican talking points and played host to numerous credibility-challenged smear artists who painted Obama as a dangerous radical. When he was not going after Obama, Hannity attacked members of Obama's family, as well as Sen. Hillary Clinton and other progressives, and denied all the while that he had unfairly attacked anyone.
Hannity's attacks may have also influenced mainstream media coverage. ABC News' George Stephanopoulos appeared on Hannity's radio program on April 15, during which Hannity suggested to Stephanopoulos that he ask Obama at the Democratic presidential debate the following evening about his "association with Bill Ayers, the unrepentant terrorist from the Weather Underground." Stephanopoulos assured Hannity that he was "taking notes right now." Stephanopoulos then did ask Obama at the debate to "explain that relationship for the voters, and explain to Democrats why it won't be a problem," though he later denied that Hannity had exerted any influence on his questioning.
Because of the unending stream of falsehoods and character attacks that fueled the "Stop Obama Express," and the countless other distortions he promoted throughout 2008, Sean Hannity is Media Matters for America's Misinformer of the Year.