At the same time as he lost the South Dakota Democratic Primary, Barack Obama won the Montana Democratic Primary and simultaneously secured enough delegates to clinch the Democratic Party's nomination for President over Hillary Rodham Clinton.
According to the Secretary of State of Montana, at the time of the primary, Montana had 630,658 registered voters from a 2007 population of 957,861 in 56 counties. Turnout was estimated to be at 28.80 percent.
Early on the day of the primary, hours before polls closed, the Associated Press projected Barack Obama's nomination for the presidency. The projection was based on the declarations of a large number of Democratic superdelegates, as well as exit polls of voters in South Dakota and Montana. However, the AP calculated that Obama would be the presumptive Democratic nominee even if he lost the primaries in both South Dakota and Montana simply because he was so far ahead in the delegate count.
Like many Western states, Montana was handily won by Barack Obama, although Hillary Rodham Clinton did considerably better here than in many other states in the area. According to exit polls, 91 percent of voters in the Montana Democratic Primary were Caucasians and they opted for Obama by a margin of 56-41 percent. Obama swept all age groups, socioeconomic classes and educational attainment ladders except senior citizens ages 65 and over who supported Clinton by a margin of 57-40. Obama won all ideological groups and voters from both major parties as well as Independents. Regarding religion, Clinton won Protestants by a margin of 52-45 while Obama won Roman Catholics by a margin of 52-46, other Christians by a margin of 56-41, and atheists/agnostics by a margin of 75-24.