Brendan Nyhan thinks that expanded fact-checking during the 2012 campaign made a difference. He hopes the progress will continue:
The criteria for success … should not be the addition of more specialized factcheckers or the production of more factchecking articles and TV segments. Dedicated factcheckers like PolitiFact and Factcheck.org play a critical role, but we will know that factchecking has succeeded in changing American political journalism when it disappears as a specialized function. The process of factchecking needs to be integrated into political coverage, not ghettoized in sidebars and online features. If more reporters adopt best practices for covering misinformation (including exercising discretion in not fact-checking some statements), politicians and other public figures could face even more effective scrutiny in 2013 and beyond.