| [[File:Pennsylvania Presidential Election Results 2012.svg|300px]]
| County results
| [[File:2012PApresidentcongressionaldistrict.svg|300px]]
| Congressional district results
| [[File:Pennsylvania Presidential Results 2012 by Municipality.svg|300px]]
| Municipality results
| [[File:2012 Pennsylvania presidential election by precinct.svg|300px]]
| Precinct results
ObamaRomneyTie
The 2012 United States presidential election in Pennsylvania took place on November 6, 2012, as part of the 2012 United States presidential election in which all 50 states plus the District of Columbia participated. The primary election to select the Democratic and Republican candidates had been held on April 24, 2012. Pennsylvania voters chose 20 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. Pennsylvania's electoral vote number was a reduction from the 2008 delegation, which had 21 electors. This change was due to reapportionment following the 2010 United States census. Pennsylvania's 20 electoral votes are allotted on a winner-take-all basis.
Obama received 51.97% of the vote, beating Romney's 46.59%. Also on the ballot were physician Jill Stein of the Green Party and former New Mexico Governor Gary Johnson of the Libertarian Party, who received 0.37% and 0.87%, respectively. While the state had voted for a Democrat since 1992, it remained competitive, especially after Bush's loss of only 2.5% in 2004. Its competitiveness was attributable to the stark contrast between the state's diverse, urban voters in areas such as Philadelphia and Pittsburgh; and rural, blue-collar voters in the rest of the state. However, massive margins in the urban regions of the state and victories in the Philadelphia suburbs, Lehigh Valley, Scranton, and Erie delivered a considerable victory for the president. Obama received over 85% of the vote in Philadelphia County, the highest vote share in its history as of 2024.
Regardless, Romney improved on John McCain's 10.32% loss in the state in 2008. Just like in 2008, Pennsylvania was the most Republican of the three Rust Belt swing states (including Wisconsin and Michigan) in 2012. Five counties that voted for Obama in 2008 voted for Romney in 2012: Berks, Cambria, Carbon, Chester, and Elk. This made Obama the first Democrat to win the presidency without carrying Cambria County since Woodrow Wilson in 1916, and made him the first Democrat to win the White House without carrying Elk County since Franklin D. Roosevelt in 1940, and the first to do so without carrying Carbon County since John F. Kennedy in 1960.
As of the 2024 presidential election, this is the last time that Chester County voted for the Republican candidate, that Luzerne County voted for the Democratic candidate, and that Pennsylvania voted more Democratic than the nation as a whole.
This was the last time a Democratic presidential nominee has won every Northeastern electoral vote. Pennsylvania voted twice for Republican Donald Trump in 2016 and 2024, and Maine's 2nd congressional district voted for Trump in all three of his runs. This was also the last time Pennsylvania voted to the left of Virginia, with Virginia being the only former Confederate state never to have voted for Trump.
Primary elections
Democratic primary
Incumbent Barack Obama ran unopposed on the Democratic primary ballot on April24. In the floor vote taken at the Democratic National Convention, 242 Pennsylvania delegates voted for Obama, while the other 8 of the state's 250 allocated votes were not announced.
Republican primary
Four candidates were on the Republican primary ballot: Mitt Romney, former Senator from Pennsylvania Rick Santorum, U.S. Representative from Texas Ron Paul, and former Speaker of the House Newt Gingrich. He had just lost 3 primaries to Romney, and Romney appeared poised to become the presumptive nominee by achieving a prohibitive lead.
As momentum in the Republican race built for Romney, Santorum suspended his campaign for four days to meet with 'movement conservatives' to strategize. Rather than returning to campaigning the next Monday, Rick and Karen Santorum canceled campaign events scheduled right after Easter weekend to be in the hospital with their youngest daughter.
In deference to the sick child, Romney ceased airing attack ads, replacing them with positive introductory ones.
On April 10, Santorum formally suspended his campaign. On May 7, he endorsed Romney. Santorum and Gingrich both released their delegates to Romney in August, shortly before the Republican National Convention.
Candidate
Votes
Percentage
Projected delegates
Actual delegate voteWhen Pennsylvania delegation chair Tom Corbett announced the Pennsylvania delegates' votes on the convention floor, he said that sixty-seven delegates had voted for Romney and five had voted for Paul Ryan. However, since Ryan was not a candidate (rather, he was Romney's running mate), it is generally assumed that Corbett misspoke—that the five votes were actually for Ron Paul.
Mitt Romney
468,374
57.8%
31
67
Rick Santorum
149,056
18.4%
4
0
Ron Paul
106,148
13.1%
5
5
Newt Gingrich
84,537
10.4%
3
0
Write-in votes
2,819
0.3%
**Unprojected delegates**
29
**Total:**
**810,934**
**100%**
**72**
**72**
General election
Polling
In statewide opinion polling, incumbent Barack Obama consistently led challenger Mitt Romney by a margin of between 2 and 12 percentage points. Analysts rated Pennsylvania as a "likely Democratic" or "Democratic-leaning" state in the presidential race. At the time, Pennsylvania's electoral votes had gone to the Democratic candidate in every presidential election since Bill Clinton won it in 1992.
During the summer, there was significant spending on political advertisements in Pennsylvania, by both the Obama campaign and pro-Romney groups such as Crossroads GPS and Americans for Prosperity. However, because Obama maintained a consistent lead in polling, Pennsylvania came to be considered a "safe state" for Obama, and campaign advertising subsided substantially in August. In total, pro-Romney spending in Pennsylvania was estimated to amount to as much as $12 million, much more than Obama campaign spending. The Obama campaign characterized the pro-Romney spending surge as "an act of sheer desperation", while the Romney campaign argued that they had a realistic chance of winning the state. In the end, Obama carried the state by a modest margin, albeit narrower than his 2008 landslide over Senator John McCain.
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