In 1859, Wilson was elected to the Iowa Senate, where he served on the Committee of the Judiciary.<ref name=nytimesobit/>
In 1859, Wilson was elected to the Iowa Senate, where he served on the Committee of the Judiciary.<ref name=nytimesobit/>
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===U.S. House of Representatives===
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In 1861, Wilson was elected to the U.S. House from Iowa's 1st congressional district (the southern portion of the state), defeating [[Democrat]] opponent [[Julius E. Neal]] by sixteen percentage points.<ref>[https://www.ourcampaigns.com/RaceDetail.html?RaceID=474326 IA - District 01 Race - Special Election Race - Oct 08, 1861]. ''Our Campaigns''. Retrieved November 27, 2021.</ref> He filled the vacancy left upon the resignation of Samuel R. Curtis, who was appointed to become a colonel in the [[American Civil War]].