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Those attacks have come under increased scrutiny, as Palin has routinely linked Obama with 1960s radical Bill Ayers and today linked Obama to Rashid Khalidi, a Columbia University professor and former PLO associate. Palin has also accused the Democrat of promoting socialism.
Vargas asked Palin if she continued to reference Obama's relationships in order to suggest he was "un-American," an historically loaded term.
Palin said she was not calling Obama "un-American," but was calling attention to his record.
"[I'm] not calling him un-American. There is nothing wrong, though, with calling someone out on their record, their associations… The association issue here, it's not mean spirited. It's not negative campaigning. It's important and fair to the electorate."
In her interview with Vargas, Palin stepped back from comments she made Tuesday in Ohio in which she suggested that if elected, Obama would rewrite the Constitution to allow courts to confiscate private property.
"[I am] asking the question, what do his comments, from back there in 2001, candid comments that are caught on tape, what do they suggest in terms of his idea for future Supreme Court Justices, and perhaps for being able to reach some of the goals that it seems that he has in terms of redistributing other people's wealth… But not an explicit allegation like that," she said.
Palin was referring to a 2001 radio interview Obama gave regarding the Supreme Court when he said, "The Supreme Court never ventured into the issues of redistribution of wealth and sort of more basic issues of political and economic justice in this society. And to that extent, as radical as I think people tried to characterize the Warren Court, it wasn't that radical. It didn't break free from the essential constraints that were placed by the founding fathers in the Constitution, as least as it's been interpreted."