ABC News' Teddy Davis and Imtiyaz Delawala report: When Sarah Palin addresses the Republican National Convention on Wednesday evening, she is planning to deflect attacks on her readiness to be vice president, in part, by zinging Sen. Barack Obama's days as a community organizer."I guess a small-town mayor is sort of like a ‘community organizer,’ except that you have actual responsibilities," Palin plans to say, according to excerpts of her remarks which were released to the media. Obama was elected to the U.S. Senate in 2004 and to the Illinois State Senate in 1996. But he often cites his days as a community organizer, prior to his matriculation at Harvard Law School, as evidence that he understands the concerns of everyday Americans. "When I listen to another worker tell me that his factory has shut down," Obama said at last week's Democratic National Convention, "I remember all those men and women on the South Side of Chicago who I stood by and fought for two decades ago after the local steel plant closed."Prior to Palin's election as governor of Alaska in 2006, she served as a member of the city council and mayor of her tiny hometown of Wasilla (population 6,700 at the time). During Wednesday night coverage of the Republican convention, the McCain campaign is planning to air a television ad on CNN and Fox, contrasting Palin's experience with that of Obama.