Year Popular vote margin, rounded Vote changes sufficient to sway election Percent of popular vote sufficient to change outcome Electoral vote margin States where votes would be changed (corresponding electoral votes)
184440,0002,5540.09%65New York (36)
1848140,0006,6690.23%36Pennsylvania (26)
1856500,00011,1550.28%60Illinois, Tennessee, Kentucky (35)
1876-250,0004450.01%1South Carolina (7)
18802,000*8,4160.09%59Oregon, Connecticut, Colorado, New Hampshire, Indiana (32)
188460,0005750.01%37New York (36)
1888-90,0007,1870.06%65New York (36)
1892400,00025,3620.21%132California, Indiana, North Dakota, Kansas, Wisconsin, West Virginia, Illinois (68)
1896600,00018,6020.13%95Kentucky, California, Oregon, Indiana, West Virginia, Delaware (50)
1916600,0001,8870.01%23California (13)
19482,200,00029,2940.06%114Ohio, California, Illinois (78)
1960110,00014,2650.02%84Hawaii, Illinois, Missouri, South Carolina (59)
1968500,00041,9710.06%110Missouri, New Jersey, Alaska (32) **
19761,700,00012,7910.02%57Ohio and Mississippi (32)
2000-500,0002690.00%5Florida (25)
20043,000,00059,3010.05%35Ohio (20)
200810,000,000495,3100.38%192North Carolina, Indiana, Florida, Ohio, Virginia, Iowa, New Hampshire (97)
20125,000,000214,7640.17%126Florida, Ohio, Virginia, New Hampshire (64)
2016-3,000,00038,8750.03%77Michigan, Pennsylvania, Wisconsin (46)