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122 Pol. Sci. Q. 1 (2007-2008)

handle is hein.journals/pclscceqry122 and id is 1 raw text is: 






Referendum: The 2006 Midterm


             Congressional Elections











                                                   GARY C. JACOBSON

             Collectively, the American electorate treated the 2006  midterm
congressional elections as a classic referendum  on  the performance   of the
president and  his party. Most voters held negative views of both George  W.
Bush  and his Republican partisans in Congress, and as a consequence, Demo-
crats won majority control of both chambers  for the first time in twelve years.
Table 1 summarizes  the results. Democrats picked up thirty seats in the House,
fifteen more than necessary to take over, winning a majority one seat larger than
that held by the Republicans in the previous Congress. They also gained six Sen-
ate seats, all taken from Republican incumbents, to win a one-seat majority in the
upper house. Remarkably,   Democrats  lost not a single seat in either body, the
first election in U.S. history in which a party retained all of its congressional seats.
    According  to the political science literature, party fortunes in midterm elec-
tions are broadly shaped by three basic factors: the number of seats the presi-
dent's party already holds, how well the economy  is performing, and how  the
public views the president's performance in office.' Although there is no consen-
sus on the  relative importance of each condition or the way  they ultimately
influence voters' decisions, in combination, they do predict midterm partisan seat
swings with considerable accuracy. This was true in 2006 as well; for example, a
simple model employing  standard measures  of these variables predicts a twenty-
six seat gain for Democrats  in the House.2 Because  the economy   was doing
quite well by customary measures, the model attributes the Republican losses to
the President's extraordinarily low standing with the  public. Bush's 38 per-


   1 For a discussion of this literature and a full set of citations, see Gary C. Jacobson, The Politics of
Congressional Elections, 6th ed. (New York: Longman, 2006), 154-170.
  2 The model is in ibid, p. 156, updated to include 2004; with Bush's approval at 38 percent and real
per capita income up 3.0 percent between the third quarter of 2005 and the third quarter of 2006, and

GARY  C. JACOBSON is professor of political science at the University of California, San Diego. He
is the author of several books and numerous articles on congressional elections. His most recent book
is A Divider, Not a Uniter: George W Bush and the American People.


Political Science Quarterly Volume 122 Number 1 200-

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