Although 2012 was Bachmann’s closest margin of victory, the reality is that her performance was fairly typical with her past performance.  In fact, her average percentage of the vote for her four Congressional elections is actually a hair less than 50% (49.85%.)

Congressional District 6:

2012    
Michele Bachmann 180145 50.45%
Jim Graves 175931 49.27%
Write-In 981 0.27%

2010    
Michele Bachmann 159476 52.51%
Tarryl Clark 120846 39.79%
B. Anderson (Independence) 17698 5.83%
A. Immelman (Independent) 5490 1.81%
Write-In 181 0.06%

2008    
Michele Bachmann 187817 46.41%
El Tinklenberg 175786 43.43%
Bob Anderson (Ind.) 40643 10.04%
Write-In 479 0.11%

2006    
Michele Bachmann 151248 50.05%
Patty Wetterling 127144 42.07%
John Binkowski (Ind.) 23557 7.8%
Write-In 239 0.08%

2004    
Mark Kennedy 203669 53.39%
Patty Wetterling 173309 45.94%
Write-In 246 0.07%