The midwestern "red" state which "swung" to support the Democratic party candidate, Barack Obama, during the 2008 Presidential election was:
According to the given question, we are asked to state the midwestern "red" state which "swung" to support the Democratic party candidate, Barack Obama, during the 2008 Presidential election.
As a result of this, we can see that during the 2008 Presidential elections, the state of Indiana which is considered a Republican stronghold swung and supported the Democratic candidate Barack Obama, which was the first time since the Great Depression it last happened.
Therefore, the correct answer is Indiana
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