I ask that question because I am convinced she used that address as an address only - but never lived there. Mary Toutinghi, who maintains she baby-sat may well have been a post-man not a baby-sitter:
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Huh? Read the Toutonghi interview yourself.
http://redoubtreporter.blogspot.com/2009/01/obama-baby-sitter-awaits-new-era.html
“...Toutonghi said her daughter asked if she had voted for President Obama because she had once baby-sat him.
I said no...”