In December 2007, McFadden was chosen by the Obama for President campaign to appear on the ballot as a male delegate for Obama from Maryland's 7th congressional district.
Nathaniel Hawthorne | Nathaniel Lyon | Nathaniel P. Banks | Nathaniel Bowditch | Eric McFadden | Claron McFadden | Nathaniel Philbrick | Nathaniel Dance | Nathaniel Westlake | Nathaniel Rosen | Nathaniel Wallich | Nathaniel Parker Willis | Nathaniel Lardner | Nathaniel Kahn | Mary McFadden | Joseph McFadden | Nathaniel Peabody Rogers | Nathaniel L. Carpenter | Nathaniel Kern | Nathaniel Heckford | Nathaniel Greene | Nathaniel Bacon | Gates McFadden | Steve McFadden | Nathaniel W. Watkins | Nathaniel Wheeler | Nathaniel T. Oaks | Nathaniel Thayer | Nathaniel Stookey | Nathaniel P. Hill |
He was appointed commander of the 1st Maine Infantry Regiment on May 3, with the rank of colonel.
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Jackson re-entered the Union Army on September 3, 1861, as colonel of the 5th Maine Infantry.
In 1910 he was approached by John G. McCaskey, a social acquaintance from Pittsburgh and E. W. Marland, President and founder of the 101 Ranch Oil Company of Ponca City, Oklahoma that was on the verge of failure having run out of money after drilling seven wells and only having found natural gas.