Chicago (CNN) - Abraham Lincoln rose to national prominence in the mid-1800s as a House member from Illinois, a state now affectionately known as the Land of Lincoln, and later as an iconic U.S. president.
But during a speech in Chicago on Wednesday, Hillary Clinton – who was born in Illinois – misidentified the state's most famous politician as a senator, not a congressman.
Clinton made the mistake as she was trying to compare the 2008 Democratic presidential primary – where she, as a senator from New York, squared off with then-Sen. Barack Obama of Illinois – to the 1860 race for the Republican nomination – where Lincoln, a former congressman at the time, faced off against then-Sen. William Seward of New York.
"A senator from Illinois ran against a senator from New York," Clinton said of the 2008 primary. "Just as had happened way back with a senator from Illinois named Lincoln and a senator from New York named Seward."
Noting that both she and Seward had lost, she added: "It turned out the same way."
The Republican National Committee quickly jumped on the mistake, blasting the clip and a statement to reporters.
"With Hillary Clinton trying to rewrite her own history during through (sic) this book tour, it’s only fitting that she tried to rewrite Abraham Lincoln’s history," said Jahan Wilcox, a party spokesman. "Before she embarks on another presidential campaign, Clinton might want to take a History 101 refresher."
The RNC has been aggressive in calling out Clinton during the rollout of her new memoir, "Hard Choices." Like they would in a campaign, the party committee has kept close tabs on Clinton, someone who is admittedly thinking about running for president and said this week she will likely announce her decision in 2015.
The former secretary of state's comparison was meant to drive home the point that Clinton joining Obama's first term cabinet was unlikely and show the president was building a "team of rivals." Both Clinton and Obama have become fond of the term that originated from the 2005 Doris Kearns Goodwin book about Lincoln's cabinet that bears the same name.
Despite the mistake, there is a comparison to be made between the two New York politicians.
Both went into their respective nomination fights as the frontrunner from their party. Clinton lost to Obama in the contentious 2008 primary but later became a vocal surrogate for the future president.
Seward was also seen as a shoo-in for the nomination in 1860, but after four contentious ballots at the Republican National Convention in Chicago, Lincoln secured the nomination and later won the White House.
After losing their respective races, both also went on to serve as secretary of state under the person who beat them.
The rest of Clinton's appearance in Chicago – the second of her book tour – centered around an interview with Rahm Emanuel, the city's mayor and a longtime Bill Clinton aide.