Here’s another one from the 1884 election. The prohibition of alcohol was a major issue at the time. As noted by Burchard’s speech, the Republicans were generally the pro-prohibition party and the Democrats were the anti-prohibition party.
But there was also an independent Prohibition Party that sometimes ran its own candidates. And as such, they usually drew voters away from the Republicans. So in the close election of 1884, the Republicans were worried that John St John, the Prohibition Party candidate, might get enough votes to cost them the election. So some Republicans approached St John and tried to pressure him into withdrawing from the race. But they overplayed it. They made St John mad enough that he not only kept running but he specifically started campaigning in New York where his candidacy was most likely to have an effect on the outcome of the election. The Prohibition Party, which had only received 9674 votes in 1880, got 147,482 votes in 1884 with 25,006 of these votes coming from New York.
If only 575 people in New York had switched their vote, Blaine would have beaten Cleveland for the Presidency. 1884 was the closest Presidential election until 2000.