Question: Citizens chose how many electors, who pledged to vote for a particular party's candidate, in the United States presidential election in Ohio, 1912?

Context articles: Unpledged elector
United States presidential election, 1964
Electoral College (United States)
United States presidential election in Ohio, 1912
Missouri bellwether
United States presidential election in Iowa, 1912
United States presidential election in Utah, 2012
Faithless elector
United States presidential election in Ohio, 2012
United States presidential election in Ohio, 1984

In United States presidential elections, an unpledged elector is a person nominated to stand as an elector but who has not pledged to support any particular presidential or vice presidential candidate, and is free to vote for any candidate when elected a member of the Electoral College.
 Presidential elections are indirect, with voters in each state choosing electors on Election Day in November, and these electors choosing the President of the United States and Vice President of the United States in December.
 Electors today are elected in every state by popular vote, and in practice have since the 19th century almost always agreed in advance to vote for a particular candidate — that is, they are said to have been "pledged" to that candidate.
 In the 20th century, however, several elections were contested by unpledged electors, who made no pledge to any candidate before the election.
 These anomalies largely arose over fissures within the Democratic Party over the issues of civil rights and segregation.
 No serious general election campaign has been mounted to elect unpledged electors in any state since 1964.
The United States presidential election of 1964 was the 45th quadrennial presidential election.
 It was held on Tuesday, November 3, 1964.
 Democratic candidate and incumbent President Lyndon B. Johnson had come to office less than a year earlier following the assassination of his predecessor John F. Kennedy.
 Johnson, who had successfully associated himself with Kennedy’s popularity, won 61.1% of the popular vote, the highest win by a candidate since James Monroe’s re-election in 1820.
 It was the most lopsided US presidential election in terms of popular votes, and the tenth-most lopsided presidential election in the history of the United States in terms of electoral votes.
 No candidate for president since has equalled or surpassed Johnson’s percentage of the popular vote, and since 1820, only Abraham Lincoln in 1864, Franklin D. Roosevelt in 1936, Richard Nixon in 1972 and Ronald Reagan in 1980 and 1984 have won by a greater electoral vote margin.
The United States Electoral College is the mechanism established by the United States Constitution for the indirect election of the President of the United States and Vice President of the United States.
 Citizens of the United States vote in each state and the District of Columbia at a general election to choose a slate of "electors" pledged to vote for a particular party's candidate.
The 1912 United States presidential election in Ohio took place on November 5, 1912.
 Ohio voters chose 24 electors to the Electoral College, which selected the President and Vice President.
The Missouri bellwether is a political phenomenon that notes that the state of Missouri voted for the winner in all but three U.S. Presidential election from 1904 to 2016 (the exceptions are 1956, 2008 and 2012).
 While states like Ohio, Iowa, Nevada, and New Mexico have been arguably stronger indicators of political trends in recent years, Missouri was a consistent swing state throughout the 20th century.
 Nevada has voted for the winner of every presidential election from United States presidential election, 1912 to the present, excluding United States presidential election, 1976 and United States presidential election, 2016, perhaps making it the new bellwether state.
 Prior to the 2008 elections, Lincoln County, Missouri was said to be the only bellwether county in a bellwether state.
 Missouri is also considered a bellwether of U.S. views on hot-button social issues such as stem cell research, gay rights, and school vouchers.
 Some economists also consider the state a bellwether for economic trends such as consumer confidence and unemployment.
The 1912 United States presidential election in Iowa took place on November 5, 1912, as part of the 1912 United States presidential election.
 Iowa voters chose thirteen representatives, or electors, to the Electoral College, who voted for President and Vice President.
The 2012 United States presidential election in Utah took place on November 6, 2012 as part of the 2012 General Election in which all 50 states plus The District of Columbia participated.
 Utah voters chose six electors to represent them in the Electoral College via a popular vote pitting incumbent Democratic President Barack Obama and his running mate, Vice President Joe Biden, against Republican challenger and former Massachusetts Governor Mitt Romney and his running mate, Congressman Paul Ryan.
 Prior to the election, all 17 news organizations considered this a state Romney would win, or otherwise considered as a safe red state.
 Utah is among the most heavily Republican states, voting for the Republican ticket in every presidential election since 1968, and is also the only state to have a majority Mormon population, benefiting Romney, the first Mormon to head a major party presidential ticket.
 He carried every county in the state, all by large margins.
 However, Obama would go on to win reelection nationwide.
In United States presidential elections, a faithless elector is a member of the United States Electoral College who does not vote for the presidential or vice-presidential candidate for whom they had pledged to vote.
 That is, they break faith with the candidate they were pledged to and vote for another candidate, or fail to vote.
 A pledged elector is only considered a faithless elector by breaking their pledge; unpledged electors have no pledge to break.
The 2012 United States presidential election in Ohio took place on November 6, 2012 as part of the 2012 General Election in which all 50 states plus The District of Columbia participated.
 Ohio voters chose 18 electors to represent them in the Electoral College via a popular vote pitting incumbent Democratic President Barack Obama and his running mate, Vice President Joe Biden, against Republican challenger and former Massachusetts Governor Mitt Romney and his running mate, Congressman Paul Ryan.
 This continued the streak of having the winner of the overall election winning Ohio as the state has not voted for a losing candidate since Richard Nixon in 1960.
The 1984 United States presidential election in Ohio took place on November 6, 1984.
 All 50 states and the District of Columbia, were part of the 1984 United States presidential election.
 Ohio voters chose 23 electors to the Electoral College, which selected the President and Vice President of the United States.