As the previous reviewer pointed out, the atlas called West Virginia for Gore last year, which would have given him the election. On the other hand, in the foreword, the author states Gore received 300,000 more votes than Bush, when actually it was a more than 500,000 vote margin - so perhaps he was trying to compensate.
These were far from the only mistakes.
The Atlas also gave Louisiana to Stevenson in 1956 (despite saying in the accompanying text "Louisiana went for a Republican presidential candidate for the first time since 1876"), one of many occasions in which the maps contradict the text.
In its summary of 1936, the text says "Maine had been a bellwether state, voting for the winning candidate since 1860" (in fact, it voted for the losing candidate in 1884, 1892, 1916 and 1932), and "Landon even lost his home state of Kansas, which had voted Republican in every election since its entry into the Union in 1861" (in fact, it voted Populist in 1892 and Democratic in 1896, 1912, 1916 and 1932).
In its summary of 1928, the text says "Smith won only seven states, six in the South plus Massacuhsetts." In fact, Smith won eight states, including Rhode Island, which is also missed on the map.
The map gives Pennsylvania to Cleveland in 1888, when it voted Republican.
There are numerous other errors and omissions - the text leaves out Washington when mentioning the states Bryan lost from 1896-1900; it claims Fillmore carrying Maryland in 1856 was the first time a third party won votes in the Electoral College, when the Anti-Masons carried Vermont in 1832; it claims Pierce failed to win a majority of the popular vote in 1852, when the pie chart next to the text gives him 50.9%; it gives Adams instead of Burr four states in the Congressional balloting that decided the election of 1800.