Prior to 2003, the county was part of New York's 31st congressional district (now the 29th), but was controversially redistricted out of that district and into what was the 27th, and was replaced in the 29th district by Rochester suburbs that had never before been part of the district.
Edwards was elected as a Democrat to the 88th from the 10th Congressional District (later redistricted to the 16th Congressional District) and to the fifteen succeeding Congresses (January 3, 1963–January 3, 1995).
2012 When Republican Representative R.J. Harwood retired and left the District 2 B seat open, Morse challenged Representative Phil Hart, who had been redistricted from 3B.
Childers did not run for re-election in the 2012 election, because his Senate district was redistricted and he no longer lived within its new boundaries.
2012 With District 6 incumbent Republican Representatives Brock Greenfield and Burt Tulson both redistricted to District 2, Otten ran in the four-way June 5, 2012 Republican Primary and placed second with 609 votes (26.6%); in the four-way November 6, 2012 General election, Otten took the first seat with 5,739 votes (36.28%) and fellow Republican nominee Isaac Latterall took the second seat ahead of Democratic nominees Joseph Weis and Michael Jauron.
In November, 2011, Smith filed to run for representative in the newly redistricted 17th district of the Illinois General Assembly after Rep. Daniel Biss (D-Evanston) announced he intended to run for Sen. Jeffrey Schoenberg's soon-to-be vacant state Senate seat.
2012 With District 52 incumbent appointed Republican Representative Daniel McCay redistricted to District 41, Knotwell was selected from four candidates by the Republican convention and won the three-way November 6, 2012 General election with 9,928 votes (73.6%) against Democratic nominee Daniel Paget and Independent candidate Aaron Davis.
2012 When District 21 incumbent Republican Representative James Schaefer redistricted to District 26, Qualm and appointed Representative David Scott ran unopposed for the June 5, 2012 Republican Primary; in the four-way November 6, 2012 General election, former Democratic Senator Julie Bartling took the first seat and Qualm took the second seat with 4,421 votes (27.07%) ahead of Representative Scott and Democratic nominee Gary Coleman.
It was last represented by Amo Houghton who was redistricted into the 29th District.
It was last represented by Amo Houghton who was redistricted into the 31st District.
It was last represented by Henry J. Nowak who was redistricted into the 33rd District.
The second district of Palawan was redistricted into two districts: Puerto Princesa and Aborlan is designated as the third district, while the rest of the old second district retained that nomenclature.
On August 14, 2012, she was defeated in her bid for a second term in the Republican primary election by fellow Congressman John Mica after being redistricted to the 7th district.
The district was further redistricted in the 1980s and is now majority African American and represented by the Democrat Rodney Ellis.
2012 With incumbent Republican Representatives Jerry Weiers retiring, and Steve Montenegro redistricted to District 13, Petersen ran in the three-way August 28, 2012 Republican Primary; incumbent Representative Eddie Farnsworth placed first, Petersen placed second with 12,500 votes, and former state Senator Larry Chesley placed third.
In 1912, with his Senate district had been redistricted out of existence (it had been split between new Fifth and Sixth districts, which were taken by Republican George Weigel and Democrat George Weissleder respectively), he was again the Socialist nominee for the Fourth Congressional District, coming in second again to William Joseph Cary.