The following is a guest post from Thad Hall, Associate Professor of Political Science at the University of Utah. He is the author of Evaluating Elections: A Handbook of Methods and Standards (Cambridge UP 2012).
President Obama is in a heated
confrontation with the Republican Party in the House. As we enter week two of the government
shutdown, the media continues to make two comparisons:
- between the 104th Congress and the current one (government shutdowns) and
- between the 112th Congress and the current one (debt ceiling).
However, one thing that the
media has not done is to compare the ideological composition of the current
(113th) Congress to the 104th, especially on the
Republican side of the aisle.
We can easily do this
comparison using NOMINATE data from voteview.org, which is a calculation of
liberal-conservative ideological placement of members. Given that the 113th Congress is
still in session, I compare the 104th, 112th, and 113th
congresses to see how the ideological composition of the two party caucuses –
but especially the Republican Caucus – has changed over time. Although there are some questions about how
well NOMINATE scores can be used to evaluate change in ideology over time –
after all, members are voting on different issues in different congresses and
responding to different political pressures – the data provide our best insight
into how the Congress, especially the Republican Caucus, has changed over time.
We can use these data to answer
a couple of simple questions:
Question 1: How
different is the Republican Party today compared to during the Republican
Revolution of 1995?
Answer: Very Different.
The way NOMINATE data work, the
larger the number, the more conservative a member is. The Table here presents NOMINATE data for the
Republican Caucus from the 104th, 112th, and 113th
congresses.
Look at the red boxes. The ideological positions of half of the Republican
members of the 104th Congress would now be positions held by the most
liberal 10% of their caucus in either the 112th and 113th
congresses.
Looking at the blue boxes, we see that the
ideological positions of 90% of the Republican Caucus in the 104th
Congress would be positions held by the most liberal 40% of the caucus
today. Even from the last Congress to
this congress we see a shift of ideology in the conservative direction. The ideological positions of the member who
was in the middle of the caucus in the 112th congress would now put
that same member 10 percentage points more liberal in the Republican Caucus
today. The green boxes show similar
shifts between the 112th and 113th congresses.
Percentile of Republican Caucus
|
Congress
|
||
104
|
112
|
113
|
|
10
|
0.25
|
0.45
|
0.48
|
20
|
0.32
|
0.51
|
0.53
|
30
|
0.37
|
0.58
|
0.61
|
40
|
0.42
|
0.63
|
0.67
|
50
|
0.46
|
0.67
|
0.72
|
60
|
0.50
|
0.72
|
0.76
|
70
|
0.54
|
0.76
|
0.80
|
80
|
0.60
|
0.80
|
0.86
|
90
|
0.67
|
0.90
|
0.95
|
Question 1a: Is this the same Republican Caucus that President Obama
negotiated with in 2011?
Answer: No.
The shift in the conservatism
of the Republican Caucus is clear. More
and more members are moving rightward to avoid the threat of primary election
challenges from more conservative members.
A position that would have held water with half of the Caucus in 2011
would now have the ideological support of only 40% of the Caucus today (see the
blue boxes in the Table).
Question 2: Is there a rump of back bench extremists
in the House Caucus?
Answer: Not Really.
In
the figure below, we can compare the distribution of members across the
spectrum of NOMINATE ideology values. I
have taken the minimum and maximum values from the three congresses – roughly 0
to 1.3 – and noted the percentage of members falling within each 0.1 space on
this continum. If there the Caucus was
being dominated by a conservative rump of members who are outside the Caucus
mainstream, we would expect to see a spike in the black bars (for the 113th
Congress) at the right end of the figure.
Instead, what we see is the
general shift in the overall conservatism of the Republican Caucus. There is not a spike of Tea Party Republicans
on the conservative tail; the Caucus is just more conservative. Another point to make here is that there are
three House Committee Chairmen – Jeb Hensarlin (TX, Financial Services), Edward
Royce (CA, Foreign Affairs), and Paul Ryan (WI, Budget) – and several
subcommittee chairs are in the most conservative 20% of the Caucus. These conservative members are not just Tea
Party conservatives elected in 2010 but also include long-time members like
James Sensenbrenner (WI).
Question 3: But
aren’t the Democrats polarizing too?
Answer: No.
Compare the two graphs
below. On the vertical axis we have the
party nominate values and along the horizontal axis we have the percentile rank
for each Caucus, from liberal to conservative.
When we look at the Republican Caucus, we see the clear shift up –
toward being more conservative – across all members of the Caucus. The “most liberal” members (from 0 to the 20th
percentile) of the Caucus became more conservative and the “most conservative
members” (from the 80th to 100th percentile) also became
more conservative.
Republican Caucus – Change in
Ideology Over Time
For the Democrats, we again
have the party nominate values on the vertical axis and along the horizontal axis
we have the percentile rank, from liberal to conservative. Nominate scores for liberals are generally
negative values, so more conservative values appear going up the vertical axis
and going to the right on the horizontal axis.
When we look at the Democratic Caucus, we see two things. First, “most conservative (moderate)” members (from 0 to the
20th percentile) of the Caucus did become more liberal from the 104th
to 113th Congress. However,
when we look at the median member of the Democratic Caucus, there has been
relatively little change in ideology.
The median Democratic Caucus member in the 104th Congress
would be very close to the Caucus median today.
(By contrast, the median Republican from the 104th Congress
would be a very liberal member of the Republican Caucus today.) As we move toward the “most liberal members”
(from the 80th to 100th percentile) of the Democratic Caucus, there has been
almost no change in ideological placement over this time.
The bottom line here is simple: the Republican Caucus has become more conservative since just the last Congress. The movement in the average ideological positions of Republicans from the 112th and 113th congresses is statistically significant (t=-1.96). When President Barak Obama talks to Speaker of the House John Boehner now, he is not negotiating with the same Speaker from the 2011 debt crisis. The Speaker’s caucus today is more conservative than before and its members are even more concerned about the possibility of being “primaried” in 2014.
A couple of typos?
ReplyDeleteQ1A: The GOP has moved to the RIGHT, not the left.
Q3, second para: Those 0-20 percentile are the most CONSERVATIVE (or most MODERATE, if you prefer) of the Dems, right?
(Just quibbles, but they do affect the read)
This comment has been removed by the author.
ReplyDeleteNice catch, Jarv. I've made the corrections.
ReplyDeleteCapitulation today after a shutdown of sxteen days that accomplished nothing will probably cost the GOP some seats in 2014, likely from GOP moderates in close seats, likely moving the GOP in Congress to the right again in the 115th Congress.
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