"Saturday Night Live" alum Jon Lovitz has taken to Twitter to defend comments he recently made about President Barack Obama.During a podcast recorded in January, Lovitz joked that Obama is "a f*cking a**hole" for "saying the rich don't pay their taxes." Filmmaker Kevin Smith co-hosted the episode of "The ABC's of SNL," which wasn't released online until last week.Lovitz sent a series of tweets early Sunday morning defending his rant and hitting back at those who took issue with his criticisms.