91st United States Congress
House of Representatives
Table:
District	Vacator	Reason for change	Successor	Date of successor's formal installation

California 27th	Edwin Reinecke (R)	Resigned January 21, 1969, after becoming Lieutenant Governor of California	Barry Goldwater Jr. (R)	April 29, 1969

Wisconsin 7th	Melvin R. Laird (R)	Resigned January 21, 1969, after being appointed United States Secretary of Defense	Dave Obey (D)	April 1, 1969

Tennessee 8th	Robert A. Everett (D)	Died January 26, 1969	Ed Jones (D)	March 25, 1969

Montana 2nd	James F. Battin (R)	Resigned February 27, 1969, after being appointed judge for the US District Court for the District of Montana	John Melcher (D)	June 24, 1969

Illinois 13th	Donald Rumsfeld (R)	Resigned May 25, 1969, after being appointed Director of the Office of Economic Opportunity	Phil Crane (R)	November 25, 1969

Massachusetts 6th	William H. Bates (R)	Died June 22, 1969	Michael J. Harrington (D)	September 30, 1969

Illinois 6th	Daniel J. Ronan (D)	Died August 13, 1969	George W. Collins (D)	November 3, 1970

New Jersey 8th	Charles S. Joelson (D)	Resigned September 4, 1969, after becoming judge of Superior Court of New Jersey	Robert A. Roe (D)	November 4, 1969

New Jersey 6th	William T. Cahill (R)	Resigned January 19, 1970, after becoming Governor of New Jersey	Edwin B. Forsythe (R)	November 3, 1970

California 24th	Glenard P. Lipscomb (R)	Died February 1, 1970	John H. Rousselot (R)	June 30, 1970

California 35th	James B. Utt (R)	Died March 1, 1970	John G. Schmitz (R)	June 30, 1970

Connecticut 2nd	William St. Onge (D)	Died May 1, 1970	Robert H. Steele (R)	November 3, 1970

Ohio 19th	Michael J. Kirwan (D)	Died July 27, 1970	Charles J. Carney (D)	November 3, 1970

Pennsylvania 9th	George Watkins (R)	Died August 7, 1970	John H. Ware III (R)	November 3, 1970

Illinois 1st	William L. Dawson (D)	Died November 9, 1970	Vacant	Not filled this term

South Carolina 1st	L. Mendel Rivers (D)	Died December 28, 1970

Delaware At-large	William V. Roth Jr. (R)	Resigned December 31, 1970, after being appointed to the U.S. Senate

California 38th	John V. Tunney (D)	Resigned January 2, 1971, after being appointed to the U.S. Senate

With reference to the table that covers '91st United States Congress' — "House of Representatives" section, write a one-sentence description of the highlighted cells and format it within the following JSON object {"answer": "YOUR ANSWER"}.