2012 United States Senate elections
Missouri

Party
Party
Candidate
Votes
%
±
-
Democratic
Claire McCaskill (Incumbent)
1,484,683
54.71%
+5.13%
-
Republican
Todd Akin
1,063,698
39.20%
8.11%
-
Libertarian
Jonathan Dine
164,991
6.08%
+3.83%
-
Write-ins
-
251
0.01%
n/a
Margin of victory
Margin of victory
Margin of victory
420,985
15.51%
+13.24%
Turnout
Turnout
Turnout
2,713,623
64.75%
-

Question: When they found in highest vote of magin victory?
Answer: McCaskill defeated Akin by a 15.5% margin of victory and a vote margin of 420,985.