Kate Warne, the first female detective, helped prevent a possible assassination attempt against this president. For 10 points each:
[10e] Name this president, who earlier in his career declared that “A house divided against itself, cannot stand.” This president’s 1860 campaign victory triggered the secession of many slaveholding states.
ANSWER: Abraham Lincoln
[10m] Kate Warne worked for this organization that later involved itself in anti-labor activities like breaking up the Homestead Strike.
ANSWER: Pinkerton National Detective Agency [or the Pinkertons]
[10h] The assassination attempt that Warne thwarted was named for and took place in this city. A riot against the transport of Union soldiers took place at this city’s Pratt Street.
ANSWER: Baltimore [accept Baltimore Plot]
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