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Legislative elections were held in Mexico on 18 August 1991.[ 1] The Institutional Revolutionary Party won 320 of the 500 seats in the Chamber of Deputies and 61 of the 64 seats in the Senate.[ 2] Voter turnout was 61% in the Chamber election and 62% in the Senate election.[ 3]
Results
Senate
Party
Votes
%
Seats
+/-
Institutional Revolutionary Party
14,256,447
61.5
61
+1
National Action Party
4,100,287
17.7
1
+1
Party of the Cardenist Front of National Reconstruction
1,202,425
5.2
0
0
Party of the Democratic Revolution
878,115
3.8
2
New
Authentic Party of the Mexican Revolution
487,258
2.1
0
0
Ecologist Green Party of Mexico
326,251
1.4
0
New
Mexican Democratic Party
276,661
1.2
0
0
Labor Party
258,510
1.1
0
0
Revolutionary Workers' Party
156,918
0.7
0
0
Popular Socialist Party
97,780
0.4
0
0
Non-registered candidates
14,284
0.1
0
0
Invalid/blank votes
1,138,260
–
–
–
Total
24,302,640
100
64
0
Source: Nohlen
Chamber of Deputies
Party
Mayoria
Partido
Seats
+/-
Votes
%
Votes
%
Institutional Revolutionary Party
14,051,349
61.4
14,145,234
61.4
320
+60
National Action Party
4,024,316
17.7
4,068,712
17.7
89
-12
Party of the Democratic Revolution
1,900,750
8.3
1,913,174
8.3
41
New
Party of the Cardenist Front of National Reconstruction
990,440
4.3
998,158
4.3
23
-15
Authentic Party of the Mexican Revolution
489,732
2.1
492,514
2.1
15
-15
Popular Socialist Party
411,848
1.8
414,780
1.8
12
-25
Ecologist Green Party of Mexico
329,714
1.4
332,603
1.4
0
New
Labor Party
258,595
1.1
260,266
1.1
0
New
Mexican Democratic Party
248,431
1.1
249,915
1.1
0
0
Revolutionary Workers' Party
135,360
0.6
136,341
0.6
0
0
Non-registered candidates
13,897
0.1
13,911
0.1
0
New
Invalid/blank votes
1,160,050
–
1,168,631
–
–
–
Total
24,032,482
100
24,194,239
100
500
0
Source: Nohlen
References